Capacity is as stated, as it needed charging from the BMS cutoff point (10V which is very flat) on arrival. I got exactly what I wanted at a great price so I'm happy. For a few extra quid a basic capacity indicator would be nice to have, and for a few more, an couple of extra USB C-PD ports would make this a good product. The addition of a cigarette lighter socket too would make this a great product which I'd be happy to pay the extra for. I achieved this by purchasing a cigarette lighter 3x splitter with 4 x USB and a voltage indicator, worked a treat for my weekend camping with the family. Pumped up the large air tent plus 3 air beds, ran lighting for 2 nights, kept phones and drone going all weekend too and still well over 50% charge left by my rough estimate.

This was quickly delivered. I used my Halfords 4A smart charger with a Lithium setting. the battery needed to be "woken up" before it would charge - this involved connecting it to the car battery (with the car engine off) for about 30 seconds (check Youtube for advice on this). After I had done that oit charged over about 24 hours to 13.5 volts. I used it to power a small electric outboard motor on my 2.3 metre inflatable, which it did very well.