48V/52V Ebike Battery 16Ah 20Ah 30Ah Li-ion Lithium Iron Phosphate (LiFePO4/LFP) Batteries with Charger for 2500w-350w Motor

I ordered the 20ah version but they where out of stock after I already ordered, so they sent me a 30ah instead at no extra cost, very cool seller, I haven't tested this 52v 30ah yet, but I have tested the 72v 40ah and it seems like it last forever with lots if power

Maybe I just got a bad one. I have been using the 30Ah version in my golf scooter. BTW,I also have a 48V pack (different manufacturer) made with 18650 cells. I paid more for this one, thinking I would get a better, longer lasting product. I modified my scooter to include a digital volt meter, which I view as I accelerate and run a stead state top speed. The intent is to keep my packs healthy by keeping them from dropping into too low a voltage range. The 18650 pack shows more voltage drop while accelerating than this one, BUT it seems that information has helped me keep that pack healthy. This pack shows over 48 volts until it completely dies (voltage shows in the 20s). I absolutely hate taking a pack to this point, but it has been hard to keep it from getting to that point. It has now "fallen off the cliff" about five times and now the pack will not give me more than about 20 minutes of usage. It does charge, but only for about ten minutes. I have left it charging overnight, charging at 68 degrees rather than at 80 degrees, etc. The pack just seems dead. I bought it about 16 months ago and stored it in the basement over the winter. I can't see that I have over 50 cycles on this battery pack, so fair warning. Maybe my fault, for deep cycling it too many times, but I've got to believe the protection circuitry should have better protected the pack.

Used this to replace lead acid batteries for my scooter. It works very well I think it’s closer to 20ah update: charger almost caught fire less than a year after purchase. No warranty from seller. Buy from a better seller

I ran mine down completely to see what the real capacity is. I got 17.87 Ah out of it, not the full 20. So they are over-specifying the capacity a bit, but I still consider it a pretty good deal at that capacity. My previous 15Ah battery cost nearly twice as much, and was about the same size and weight. So this one is a considerable improvement for way cheaper.

I charged this battery to 55v [ I had an emergency] I put 25 miles on it and still have 51v left i will be buying another. Awsome battery for its weight at 20 pounds. Ihighly recomend. i have an update. battery just died at 43v. i road a total of 35.5 miles full electric no pedal assist (disconected). I have another update after the 3rd charge battery only charges to 56v then drops drastically off to 54v I have used 2 58.8v chargers and they both cut off at 56.4v while charging the battery. That tells me that BTR sold me a 48v battery claiming it is 52v. They sent me my money back.