Ampere Time LiFePO4 Deep Cycle Battery 12V 100Ah with Built-in BMS, Perfect for Replace Most of Backup Power and Off Grid Applications

(10 customer reviews)

Sale Price $399.99

You Save: 16%

【Automotive Grade Lithium Battery】Ampere Time lithium iron batteries have exceptional quality since they are manufactured by Automotive Grade LiFePO4 Cells with higher energy density, more stable performance & greater power. Highest-level safety based on UL Testing Certificate for the cell inside the battery. With no acid in the battery, you’re able to safely mount in any position. This makes li-iron batteries perfect for solar home, RV, campers, motor homes, off-grid applications.

【10 Years lifetime】Ampere Time LiFePO4 battery provides 4000+ cycles (10 times longer) & a 10-year lifetime compared to 200~500 cycles & a 3-year lifetime in lead acid battery.

【1/3* Lightweight】Ampere Time LiFePO4 Battery Weighting only 24.25 lbs for one module, it’s weighs only 1/3* the weight of lead acid batteries. LiFePO4 battery is 50% lighter than lead acid battery with the same capacity.

【95%* Efficiency】Ampere Time LiFePO4 battery’s flat discharge curve holds above 12.8V for up to 95%* of its capacity usage, providing astronomical boosts in run-time compared to only 50% in Lead Acid. This product is your best choice for outdoor camping power and indoor easy installation. Without memory effect, no matter what state the battery is, it can be used as soon as it is charged.

【100% Protection & Delivery】Ampere Time LiFePO4 battery has built-in BMS to protect it from overcharge, over-discharge, overcurrent, and short circuit with excellent self-discharge rate. Operating Temp: Charge: 0°C~50°C; Discharge: -20°C~60°C. Our battery is IP65 waterproof, setting you free from worrying to install indoors or outdoors. The batteries will be shipped from our warehouse in Los Angeles, CA or Dallas, TX according to the inventory and order address to shorten the delivery time

【For Trolling Motor】This 12V 100Ah battery is suitable for energy storage rather than start-up and supports a max. discharge current of 1C. If a battery needs to be used in trolling motor, the current supported by battery should be four or five times the current required for trolling motor. Recommended: 12V 100Ah battery for 20~30lbs thrust trolling motor. (For recommendation on other models of trolling motors or starter batteries coming later this year, please feel free to contact Ampere Time.)

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Brand: ‎Ampere Time


Ampere Time LiFePO4 Deep Cycle Battery 12V 100Ah with Built-in BMS, Perfect for Replace Most of Backup Power and Off Grid Applications

Ampere Time LiFePO4 Deep Cycle Battery 12V 100Ah

Ampere Time LiFePO4 Deep Cycle Battery 12V 100Ah with Built-in BMS

Ampere Time LiFePO4 Deep Cycle Battery 12V 100Ah

Additional information



‎Ampere Time



Item Weight

‎24.2 pounds

Product Dimensions

‎13 x 6.82 x 8.48 inches

Country of Origin


Item model number



‎1 Lithium Ion batteries required. (included)

Manufacturer Part Number



‎12 Volts



Date First Available

January 29, 2020

10 reviews for Ampere Time LiFePO4 Deep Cycle Battery 12V 100Ah with Built-in BMS, Perfect for Replace Most of Backup Power and Off Grid Applications

  1. Yongjian DongYongjian Dong

    Initially I just wanted to know if the lower priced lithium battery can meet my requirements, the answer is Yes, with a 2000w inverter and 400w solar panel, this 100AH battery could support my laptop and cellphone all day without any problems, actually I also use it to drive my coffee maker 1500w, great product!Realized that higher voltage will have lower ampere , it will reduce risks when using high power consumption appliance, I purchased 2nd battery of Ampere time, connecting 2 batteries in serious, with a new 3000W inverter, now the battery can easily drive my RV air conditioner for a short time to cool down the RV , the batteries are working great, even I discharged it to 1.7% of capacity, it was charged quickly second day , strongly recommend this productThis is 3rd battery I purchased from Ampere Time, I replaced my old 2 lead acid 6v 200AH golf cart batteries, significant light, no any worries about adding distilled waters, the voltage is very stable even water pump is running. I checked with Ampere time that the battery can be charged at least 95% capacity of battery with existing lead acid charger of my motor home, it’s good enough for me, good deal!

  2. Amazonian Afficianato

    For reference: in another system, I have 3: 100 ah BattleBorn’s – which I paid twice as much for and though I love them I personally can’t tell any difference with these ampere time batteries. In my off grid cabin, I have 4 of these Ampere Time 12v 100 ah batteries connected in parallel (400 ah, 12v) to (10) 100-WATT panels via a 40 amp MPPT controller… and I don’t have to think about them at all. They take a solid charge and last through the cloudy days with ease. This 5.2 KWH system runs my off grid lifestyle day after day without issue or concern. I’m running a full sized fridge, small microwave, toaster, instant pot and a few low power LED lights connected to a 3000 watt inverter and it is perfect – even in winter months when the sun rises low. The batteries take about a week to arrive, but show up flawless in good packaging and perform just as expected. I see the price fluctuate a bit as they find their place in the market, but so far, I can’t find a better value. Great product, and Battle Born finally has some real competition. If you know what you’re doing, I would definitely recommend. I’ve purchased 6 so far and no regrets.

  3. Brent C.

    These are my first experience with Lithium Batteries. I’m using four of them to power my 2000watt inverter for the solar outfit I have put in my Grand Design 5th-wheel RV. I’m still amazed at how different Lithium batteries are from lead acid. At 71, the 75 pound lead-acids have become a problem to move about. These batteries are less than 25 pounds. I’ve tested all the devices in the RV except the AC’s (don’t intend to use them with the inverter), and when pumping out over 150 DC Amps I’m yet to go below 13 volts on my battery monitor. The price is certainly right, too. I’m not sure why people pay 400 dollars more for the others; I did notice that these are warrantied for 5 years, and perhaps its the number of charge cycles they’re rated for that make the others so expensive. I believe these are rated for 4000-6000 charge cycles from empty to full. They have an expected lifetime of 10 years. With four of them (400 amp hours), I doubt they’ll ever go much below 50% SOC unless I do a lot of microwaving and run the refrigerator from them instead of propane. Anyway, I am very pleased with what I’ve seen so far.Being new to Lithium and trying to figure out the settings on my Victron BMV 712, I emailed customer service with questions about five times. As regular as the clock, I had an answer promptly the next day every time.I suppose time will tell as I put them to work, but after a week of testing, I am very pleased. The only complaint I might make is that the bolt that comes with the battery is very short, half-inch I think. I wish it was a quarter inch longer which would make connecting two, 2/0-guage lugs to put the batteries in parallel a bit easier.

  4. PK

    These batteries have performed as promoted in every category.Shipping was fast, and Seller is very responsive.Packaging is good, and the batteries come with good documentation.Price is competitive, and with a 5 year warranty (which can be backed up with supplemental insurance offered through Amazon), I definitely recommend this product and this Seller.

  5. mobyvic

    Put the battery in my RV. Went boon dock camping miles from anything. Still don’t know what happened for sure. The generator was running and suddenly shut down. I checked the battery and it showed dead, nothing at all. I took the battery out and then found that there was blown fuse on the converter. I hooked the new battery up to solar system and the battery came back to life and was almost fully charged. I believe that the internal system in the battery shut it down and the solar triggered it back to life. It would be nice if this battery came with some sort of manual that explained the whole thing, especially considering the price paid. When you are out in the middle of nowhere it crazy to think you can make a call to their tech line. The batter does seem very efficient. It takes a charge quickly and holds it. Considering I replaced two golf cart six volt batteries for this very light battery it is remarkable. Time will tell how it all works out.

  6. Blind Wolf

    This product was as advertised and works great with my other lithium batteriesIt replaced four Lead Batteries.It is as long as two battel born batteries put side by side.I will be buying another one soon As advertised is a true 200 amp battery well-builtOct 24, 2020 update.Still running strong. If you going to draw more then 100 amp and only using one of these, it will limite how much you can run on a inverter.In general buying two 100ah would give y ou double the amps, same holds true with this, if you going to drive a high load, then you better buy more then one.12v system takes 100 amps to run roughly 1000 watts on a inverter.I have Five Lythium batteries, and a 8k inverter, and I hit a dead wall at around4250 watts before I noticed a sagging drop in output o0f my inverter.Luckly I got three more of these coming and switching to a 24v system will help a lot. And at 24v 1000watts will ony take 50 amps to pull from the battery bank, and with two 12v 200ah into a 24v will basicly give me 200 amp out put which means I can drive 4k watts on just a set of these with no issue, cause lord knows I’m going to need it with a 12k inverter being installed in two months.

  7. DoxxenDoxxen

    Alrighty! Time for my review. As a techie, I always like to do a bunch of research before I buy a product, and then share what I learn with the community via the review process! That way I can save y’all some time in finding such information yourselves. =)First, let’s talk about advertised capacity. Don’t believe what those other reviewers are telling you. Who knows what standards they are using! According to my handy dandy (and highly trusted) load meter, my 300AH batteries are each offering just over their rated capacities (see attached picture for an example of one particular battery). So no issues here! Quite the technological leap forward when compared to lead acid battery capacities, I must say, which can’t be safely discharged past a pathetic 50% SOC!Next, let’s talk about battery longevity. Unlike lead acid batteries that must be kept topped off at all times (or they’ll sulfate and die) lithium batteries don’t suffer from any negative side effects when partially charging/discharging them (and in fact, PREFER to be partially charged/discharged). Thus, I have decided to charge my new LiFePO4 batteries daily to about 80% or so. You see, research has shown that by only partially charging/discharging LiFePO4 batteries, their lifespan can be extended to between one and two times their advertised rating. So for example, if one only regularly cycles their LiFePO4 batteries up/down by no more than 50% at a time (by going back and forth between, say, 75% SOC and 25% SOC) than said batteries can theoretically be charged/discharged a total of 8000 times rather of 4000! Of course, like all batteries, calendar age has its limits. But nevertheless, the point is, partial charging/discharging LiFePO4 batteries can SIGNIFICANTLY increase their lifespan. So, to achieve this, all one has to do is overprovision their battery bank accordingly, and set the proper charging algorithms as explained next…Now, let’s talk about ideal charging parameters. My batteries are housed in an RV, with a solar system charging them, but the principal is the pretty much the same regardless of battery application. To achieve any particular SOC, I have learned that all one has to do is lower their charger’s boost voltage accordingly. So for me, I have found that setting a boost voltage of 13.8V yields me that 80% SOC to which I prefer, once I hit that voltage. Actually, let me just go ahead and bust out all my charging parameters for y’all, so you can see exactly what I mean:15.0V = Over Voltage Disconnect Voltage14.6V = Charging Limit Voltage14.2V = Over Voltage Reconnect Voltage14.6V = Boost Voltage (To Achieve 100% SOC) ** One day a month I set my boost voltage to 14.6V to ensure that proper internal cell balancing takes place, which evidently doesn’t start occurring until cells reach 14.2V or so.14.2V = Boost Voltage (To Also Achieve 100% SOC) ** Technically, to achieve 100% charge capacity, 14.2V is good enough, and is theoretically a safer setting to use than 14.6V so as to ensure that any imbalanced cells in the mix don’t get as easily overcharged (while still allowing internal cell balancing to occur). In the end, I may indeed settle on 14.2V once a month rather than 14.6V. I’m still on the fence about this one.14.0V = Boost Voltage (To Achieve 90% SOC)13.8V = Boost Voltage (To Achieve 80% SOC) > MY IDEAL SETTING13.7V = Boost Voltage (To Achieve 70% SOC)13.6V = Boost Voltage (To Achieve 60% SOC)13.8V = Equalization Voltage (Ultimately Irrelevant, But Must Nevertheless Be Set To ≥ Boost Voltage)13.8V = Float Voltage (To Hold 100% SOC)13.5V = Float Voltage (To Hold 80% SOC) > MY IDEAL SETTING13.2V = Boost Reconnect Voltage12.4V = Low Voltage Reconnect Voltage12.0V = Under Voltage Warning Reconnect Voltage11.6V = Under Voltage Warning Voltage11.6V = Over Discharge Reconnect Voltage10.8V = Low Voltage Disconnect Voltage10.4V = Discharging Limit Voltage10.4V = Over Discharge Disconnect Voltage0.8 Secs = Over Discharge Delay TimeEqualization Duration = 0 Mins (LiFePO4 Batteries Are Not Supposed To Be Equalized, EVER)Boost Duration = 10 Mins ** Boost duration is not really needed when charging LiFePO4 batteries, but my charge controller needs something, and it offers a minimum of 10 minutes, so I took it. I mean, technically, one COULD set a longer boost time in conjunction with a lower (safer) boost voltage, so as to still achieve 100% SOC if one so wishes (but whereby getting to that 100% SOC will simply take more time to accomplish). So maybe 45 minutes using a boost voltage of 14.0V, 30 minutes for 14.2V, or 15 minutes for 14.4V. Ultimately, the only thing one needs to avoid doing is holding their batteries at 14.6V for ANY amount of time, so setting the absolute minimum boost duration for that particular voltage is most ideal.Low Temperature Charging Cutoff = 5°C ** This will be the most ideal (and safest) low temperature cutoff for most people, but can nevertheless be modified accordingly based on information presented in the next section…Time for the fun part! Let’s talk about charging near freezing temperatures. It’s actually not a “hard cliff” as a lot of technical literature (and reviews) seem to claim it is. Indeed, one day I finally came across the perfect table to explain precisely how fast, and at what temperatures, one can safely charge their LiFePO4 batteries at![Please now refer to the charging table I have attached to this review.]So, in my particular circumstance, I was quite surprised to learn that I can still safely charge my 1200AH battery bank in, for example -10°C temperatures, by using a charge rate of no more than 120 amps/hr to 60% SOC, 96 amps/hr to 80% SOC, 72 amps/hr to 90% SOC, and 60 amps/hr to 100% SOC! Of course, I’ll never see those charging rates come out of my particular solar panel setup, as I top out at roughly 80 amps/hr in the summer, and 40 amps/hr in the winter. So I’m more than set here! The important thing to understand is that, contrary to popular belief on the subject, one CAN — and quite safely so — charge their LiFePO4 batteries near, at, OR EVEN BELOW freezing temperatures, as long as they don’t exceed the specified charging speed per AH capacity as presented in the table. Pretty stellar, huh!Of course, for extra-super-overkill safety, I went ahead and installed individual water tank heating pads under each of my batteries anyways, which were then wired to four independently controlled external thermostats, all so as to ensure than I never even come close to risking damaging my batteries throughout the course of winter. Important to note here is that going the external heating pad route is actually quite superior to using internally-heated LiFePO4 batteries that several vendors now offer. For one, my batteries can start being heated long before the sun comes up (thereby rendering them ready to accept a charge right at sunrise rather than several hours after). And two, my four paralleled batteries stay 100% in balance to each other 100% of the time (because of how they don’t draw power from themselves on an individual basis in order to heat themselves, but rather cumulatively draw power as a whole from the bank as a whole, via my 12v bus). And so, with my handy heating pads, used in conjunction with my handy overall bank temperature sensor offered by my EPEVER charge controller (which is set to disable charging at 5°C or less), I have achieved cold-temperature-charging nirvana that those internally-heated LiFePO4 batteries surprisingly can’t compete with!Anyways, time for a summary of all my ideal charging/discharging and best maintenance practices:- Avoid using lead acid chargers (unless you know what you are doing). This is because lead acid chargers tend to operate in stages, which LiFePO4 batteries do not require (especially the float stage). Also, lead acid chargers usually charge at lower than ideal voltages (which CAN be acceptable, depending on what final SOC you want, as mentioned above). But generally, they’re worth avoiding. Also especially worth avoiding is charging via direct wire to a typical vehicle alternator, as most alternators don’t know how to limit their charging current in this type of situation, and thus, will QUICKLY burn themselves out! Of course, one can still safely charge via alternator, though, as long as they use a “DC to DC” charger to accomplish the task with.- When paralleling, first charge each battery separately to full, then parallel each to each other for a day, one by one, until all are paralleled, then start using them.- Also when paralleling, ensure that all batteries are balanced to between 0.02V and 0.05V of each other.- Keep battery temperatures between 5°C and 45°C (20°C ~ 30°C if possible).- Keep charging/discharging rates under 0.5C (0.2C if possible).- Fully charge (to 100%) and discharge (to 0%) once a month (to allow for proper cell/battery balancing to occur).- Avoid cycling below 10-15% SOC unless absolutely necessary.- Avoid cycling above 85-90% SOC unless absolutely necessary.- Avoid leaving in a deeply discharged stage (10% or less) for very long.- Avoid floating at 100% SOC no matter what, as this will KILL LiFePO4 batteries quicker than anything else! Also, if one must float at 100% SOC, at least float at a voltage of 13.8V or less. LITERALLY NEVER FLOAT LIFEPO4 BATTERIES AT 14.6V, EVER!And now for my finalized SOC table, according to voltage, that I have built based on multiple sources:VOLTAGE / SOC13.50V = 100%13.40V = 99%13.30V = 90%13.25V = 80%13.20V = 70%13.16V = 60%13.13V = 50%13.10V = 40%13.00V = 30%12.90V = 20%12.80V = 10%12.50V = 7%12.00V = 4%10.80V = 1%9.50V = 0%Of course, don’t forget to add 0.1V ~ 0.2V to each parameter to account for voltage drop, depending on how far away you’re measuring from. And the above table is for resting voltages, too, by the way, so subtract 0.2V ~ 0.4V from each parameter based on how recently (and/or strong) a charge was applied to the battery (i.e. account for surface charge), OR add 0.2V ~ 0.4V to each parameter based on how recently (and/or strong) a load was applied to it (i.e. account for surface discharge).Also, I should note that I did test my batteries for low-voltage cutoff, and they DID each cutoff at around 9.8V, which I was told by the manufacturer is within spec. So no worries here, either! Also important to note is that 9.8V was measured at the terminals, meaning if one takes “surface discharge” into account, the actual voltage to which the BMS boards cut out (at the cell level) was likely a true 10.0V, which is indeed the official lowest voltage LiFePO4 batteries can safely be taken to without permanently damaging them.Well that’s pretty much it, for now! Overall, I am 100% pleased with my super major four 300AH LiFePO4 battery purchase, of which I have had running for a couple of months now without a single hiccup, and to which I plan on running for the next 10-20 years without issue as well. In more ways than I have fingers to count with, LiFePO4 batteries are simply orders of magnitude better than their lead acid counterparts. I’m so glad the cost for them has come down over the years, and is now within reach for most of us off-gridders! As long as you treat them well, I strongly believe they will return the favor. =)PS- Ampere Time tech support has been great, for the few questions I have had for them. They also honored several 2% off coupon codes that I got from them, one for each purchase. Honestly, one of the better companies I have had the pleasure of doing business with! Go Ampere Time!PPS- Don’t forget to buy a few DC meters w/ shunts, and install them accordingly so that you can keep track of precisely how many watts you’re putting into / taking out of your battery bank! Absolutely priceless information can be gleamed with such tools. Indeed, I have four hooked up right now so that I can know, at all times, a) what’s coming in from my solar system, b) what’s going to my battery bank, c) what’s coming from my battery bank, and d) what’s going to my 12V system.

  8. gary mcspaddengary mcspadden

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     In accordance with the manufacturer’s directions we charged all the batteries one at a time to full charge using our 900 watt solar array. The solar panels go to an MPPT charge controller that has a lithium battery setting. Charge current varied from 0 to 35 amps with approximately 20 to 25 amps on average. Then the batteries were connected in parallel using copper bus bars made from copper tubing and brought to full charge again. The cable from the charge controller was 2 guage and the cable to the inverter was 1/0. Both cables were welding cable that was chosen for flexibility and oversized to reduce losses. The solar panels were then disconnected and the batteries discharged until they shut down on low voltage. The batteries were discharged through a 4000 watt pure sign wave inverter providing electricity to selected loads in our house. The load varied from 300 to 800 watts with an average of 600 watts. Average discharge current was 5 to 6 amps. Note that this is a very slow rate of discharge amounting to about 1 to 2 amps per battery. Power usage was recorded with an inline watt meter that had been checked for accuracy with 2 separate hand meters and was found to be accurate within 3%. Final analysis. Batteries were rated at 2560 Wh’s each so 4 in parallel would be rated at 10,240 Wh’s. From full charge to shut down we recorded 9.44 kWh’s. While this is below the manufacturer’s claim of 10.2 kWh’s the normal loses from cables and especially the inverter should be taken into account. Also the fact that there were 4 batteries in parallel will affect the results and I am too lazy to test all 4 batteries individually. These batteries exceeded my expectations. They will be tested again after at least 1 year and results will be posted if there is a significant decrease in capacity. Test date was November 2021.

  9. SCOTT L.

    I like the quality of the battery, the lightweight, the performance. I put it in my van which I use for camping. I power a 37 quart portable refer and a 10 speed ceiling fan. I also have a 2000 watt inverter which I use for my power tools. It all works really great! I recharge the battery from my ac plug on my dash when the motor is running. I take my van for a week or more without recharging the battery and there is plenty of unused power. Best price around for such a high quality product. Highly recommend!!

  10. DiscoveryDiscovery

    Just installed one 200ah Lithium Ion battery (received within 5 business days) to replace the 4 6volt house batteries … what a huge difference. I ran a test last night and went 14 hours running the coach off the inverter (disconnected from shore power) running the TV’s computers, receivers, fantastic fan and a sound machine all night.With 4 good 6volt batteries I can do this too but in the morning my battery life is in yellow and lately on my 3 year old batteries, I’d be in the red and need the boost button to tie all 6 together to start the generator the next morning.This morning I was still in the green which was pretty amazing as that has never happened before.If you research lead acid batteries you will find that they all pretty much false advertise .. if a 6volt says 100ah the rule of thumb is that you cut that in half so it’s really only providing 50 ah (that’s a condensed explanation).So 4 6v batteries … people think they have 400ah of power when they really only have 200ah or less!Expensive at $1200 but with the 10 year battery life and no maintenance or dangerous, explosive gasses, its well worth it. You also can’t hurt them with too much discharge or run them out of water unlike lead acid.If for a motor home ..make sure it has a cold temperature cut off, these do, cheaper models may not.Seller was very responsive to my questions.***************** One small issue ******************The lugs provided were way too short to bolt down the +/- connections to my new Lithium battery. Luckily I had longer ones with same thread size and this worked perfectly (see pics) short ones are what comes with the battery.

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