12V 100AH LiFePO4 Lithium Battery with Bluetooth Rept Cell Inside, Max 1280Wh Energy Built-in 100A JBD BMS, Perfect for Trolling Motor, RV, Boat, Solar Off-Grid

***10/18/23 Update***Never tried a capacity test, but it lasts for ages for my application; as a makeshift Jackery for car camping. Mostly charging phones, iPads, and battery banks, as well as backup for my 100ah house battery, LED lights and USB fans. I’m sure I’m getting at least 20 ah regularly. Was a little disappointed that they updated the recommended charge rate to 4A, since my Victron IP22 only goes down to 7.5A, but they still show maximum charge current of 20A which was the only spec mentioned when I purchased. I’ve never exceeded 10A charging so far, and only discharged completely once or twice, to extend the lifespan and number of cycles. Very happy with this battery so far.*Original review 6/29/22*Charges and works great. Used with EPEver Tracer solar charge controller and 100W panel, as well as Victron IP22 BlueSmart charger, current limited to below 10 amps for now. Haven’t had a chance to capacity test, but I’m charging and discharging at less than 0.2C rate, so it should last a long time. Using this as a USB fan and cell phone charging source, and secondary backup to a 100ah LIFEPO4 house battery in campervan. Like a DIY “Jackery”, except better chemistry, and modular, to extend life by repairing only what breaks. Will use with a Samlex PST-300, but only plan on using 40-60watt loads at any given time, and reserve 1C loads for emergencies. The cylindrical cell construction is what attracted me to this brand. The cells and BMS as a unit can move inside my particular unit. Not much, but it was more than I would’ve liked. I reported it to PACPOW customer service, and they offered to send a replacement of I initiate a return, but I opted to keep this unit, and just keep it in the upright position. It works great and not enough of an issue to reduce my rating. I will update review after putting it through more cycles and heavy use.

The battery came well boxed and protected. It was half charged as it took almost 10AH worth of a charge. I got this battery to use in my radio go box to replace the lithium ion I originally built it with, that is now failing.This Battery is super light for its size I initially thought it might be overrated on the capacity but to my delight it tested at over 22AH capacity. This is not uncommon with new lifepo4 batteries. Which a lot of less honest companies will take advantage of and use underrated cells in the build. The first three or four charge cycles are usually a few AH over then the battery settles in. Which is great this tells me they actually used 20 AH cells in this battery.The discharge test was done at .5 C (10 amps) using an MPPT charger to charge another battery

LFP cells use individual cells in series and parallel to attain a certain voltage and capacity. Because they are individual cells there must exists a battery charge controller inside to balance the individual cells.Many people who are unfamiliar with this may often find themselves thinking their battery is bad. When it seems to charge to full but then cut out prematurely and the same for discharge. The reason behind that is some cells are full and some are empty. To prevent overcharging and overdischarging the BCM controller will shut the load off. Because of batch variations this is not possible to avoid from a manufacturing perspective. Only way to improve from this is to charge/load cycle the batteries, both of my 20Ah units arrived in a “failed” state, cutting out the charging at 60% capacity, then on a 10A load have the battery voltage fall past 12.3V.Three consecutive 6Ah discharge and recharge cycles later they are both good. Holding at 13.6V resting and on a 10A load voltage is 12.8 nominal.What happened is that as you impose a load on the battery it gives the BCM controller headroom to equalize the charge variations between cells. And so after the third cycle all the cells charged capacity is almost equal. And now the battery can hold the rated capacity. So before you consider it a defective battery, try this firstI have bought five PacPow batteries to date. Once conditioned by the procedure above they are very good quality batteries. Rivaling bioeeno in cost. Great for ham radio go kitsKN4GEI

So far it's working great ..I have it to power my 18lb watersnake trolling motor on a Tadpole boat. Seems to move me around pretty good. Now to see how long it will last on a fishing trip this weekend.. Fingers crossed... I just don't understand it when they say it's great for trolling motors but it is forbidden to use near water.. hmmm

After only 2 uses, this battery failed to accept a charge. Volt meter reads 6.2 volts and smart charger will not charge the battery. I contacted the manufacturer at PacPow and they made good on the battery and sent me a brand new one.

Used one summer, have been inside house for winter and will not take a charge. Tried contacting company and have been given the run around with absolutely no way to actually talk to anyone.I only wanted a replacement and can’t get anything other than “did this help”… NO! It didn’t cause I haven’t spoke to anyone!

I'm an electrical engineer and wanted to check this battery before I installed it in a hard-to-reach place. I charged it for over a week at about 1 Amp Max. and usually much less (from a 50 W Renogy Solar Panel shielded by trees - via a 10 A Renogy Wanderer Charger set to 14.2 v Max.) The battery was full when I started.I then disconnected the panel and discharged the battery for about 36 hours via a 22.4 ohm power resistor. The discharge current was about .6 Amp. As you can see from the graph, the battery started at 13.9 V, and then rapidly dropped to 13.2 V within an hour. It stayed above 13 V for about 25 hours. I stopped the test when it reached 12.7 V after 35.75 hours.All in all, it produced 20.81 AH and likely still had a bit in reserve before reaching 12.6 V. It is rated at 20 AH.I am pleased with the result!