Your cart is empty.
Your cart is empty.Product Description
George E. Robertson
2025-08-29 10:20:01
This thing weighs 2 lbs and it hold enough watts to run my chart reader/depth sounder (called a fish finder) by most, for 10 hours full on runtime.. I have a solar trickle charger panel that is about 14 inches square that adds power to the battery on any day nice enough to take the boat out and together they does the job with power to spare.. I just bought another one to power port starboard stern and mast head lights on my row/sail boat for using it at night in in busy harbors. Sunny, at Btr Power, was very helpful when i had questions. They make a very nice green case that would fit this battery. its used now for their smaller 8 Ah battery. You should try to talk him into putting these 10 Ah batteries in that same grass green case. I tried but maybe if we keep asking......
Sid
2025-06-30 15:11:10
Excellent product. Works as expected.
charity services
2025-05-11 10:01:25
Did a gradual discharge then a 2ah recharge with a B6 RC charger. 8.2ah. Seems to be a good battery.
Dan
2025-03-09 17:55:59
First off: the advertised capacity of 128Wh is right on the nose. I used my standard 12V power socket USB-C charger and USB test meter combo to extract 120Wh total out of the battery (charged to 14.6V, discharge stopped at the recommended 10V, average discharge rate ~25W). With a conservative estimate of 93% efficiency for the 12V USB charger, we get actual battery capacity of 129Wh (120Wh / .93). In other words: the capacity is spot on.This LiFePO4 battery stands out on its relatively high energy density compared to similar LiFePO4s in the same weight / capacity class; it weighs 992g / 2.2lb, or nominal energy density of 129Wh per kg (128Wh / .992kg) at the battery level. I previously tested two other LiFePO4 batteries (12Ah / 153.6Wh and 7.2Ah / 92Wh), with energy densities of 104Wh/kg and 100Wh/kg respectively at their nominal capacity. So, this BtrPower battery is some 24-29% higher in energy density, especially compared to the 7.2Ah battery which has exactly the same dimensions as this 10Ah one.One downside: it came in a brown paper box with ZERO documentation; not even a piece of white paper with printed specs. So, I pulled together the specs from the various product listing slides and summarized below:- BMS with overcharge, over-discharge, over-current / short circuit, low and high temperature cut off (no information on overcharge and over-discharge cutoff voltage threshold, and no information on BMS reconnect voltage.)- Max continuous charge / discharge current: 10A- Charge temperature range: 0-50°C(32°F-122°F); discharge temperature range: -20-60°C(-4°F-140°F). (I presume the BMS will cutoff charge / discharge outside these temperature ranges.)- Life cycle: claimed to be grade A LiFePO4 cells that "can reach more than 3,000 cycles" and 97% capacity after 2,000 cycles "with good usage habits," presumably meaning relatively shallow DoD and slower charge / discharge currents.Overall, this is a good LiFePO4 battery with excellent density. At a compact, standard size of 5.9 x 2.6 x 3.9", it can be a drop-in replacement for deep-cycle lead acid /AGM batteries in devices such as low-power UPS, solar-charged LED lights, portable (
H F.
2025-03-07 12:58:27
I bought two of these 8Ah LFP batteries in June, 2023 for $27.29 each. They arrived in a reasonable time with no documentation of any kind.Both thump a little bit when I shake them, which does not concern me. Other batteries of this kind I've purchased don't thump because of foam strips and/or glue holding the battery pack in place.Both were partially charged on arrival, as expected. I finished (14.4 V) the charge at a 2A rate. Then, I ran discharge tests using an 11-ohm load. Capacity measurements were 7.48 and 7.40 Ah. That's 93.5% and 92.5% of the seller's claim. Almost all the other LFP batteries I've bought have exceeded 95% of their capacity claim.I haven't had them long enough to evaluate whether they self-discharge. I'll try to update this review when I have such information.July 26 update: The first battery's capacity measured 7.35 Ah after sitting on the shelf for 10 days after a full charge. Measurements after subsequent charges with discharge tests immediately following gave 7.40 and 7.37 Ah. The 2nd battery measured 7.29 Ah after 11 days on the shelf and then 7.30 Ah in a subsequent test immediately after charging.Thus, it seems that there is a little bit of capacity loss and a bit of self-discharge too.
bobwatts
2024-11-16 14:31:54
Because of mainly extremely favorable reviews and test data I decided to not do an extensive test of the battery and just put it into service. My previous experience with lead acid batteries for my projects is merely OK, and I thought I would try some alternatives.Every item in this review including lights, DMM, parts, etc. was purchased from Amazon.After initial setup and testing to establish some numbers, I set up the battery in a "Gnome House" tree stump powering a 3.7V DC LED light with voltage stepped down to around 3V DC using a buck converter. (note the buck converter has a LED readout, but I checked the readout with a known accurate DMM to make sure it was at least close). I have decided to mainly switch to lower voltage "stuff" to use less power and get greater longevity from my power source(s).Installation shown is temporary for testing and will be "cleaned up".Battery was installed at around 13.4V DC and after running about a 3 volt light at about .2 amps for over 9 hours it barely lost any power, still reading 13.1V DC in the morning before solar charging took over.Obviously the battery is barely working in this configuration, and I can add much more of a load to it.I expect the battery to charge to around 14.4V DC during the day so it will have no problem maintaining the present setup. I'll probably add to the load with more lower voltage "stuff".So far I'm very impressed, and the next test will of course be longevity, but that will take some time.Highly recommended !
Recommended Products