Great service and battery.

This definitely fulfilled our science project with 2 boys 11 and 10. We built a Solar Generator using a milk crate and this battery, Came quite quickly through USPS without a hitch. It did come quite low charged -- I think down to 7 volts when I read it but it handled being charged quite nicely. I am thinking about getting one more to parallel connect and have 56 ah and connect a 300-watt inverter instead of the 2. But, alas, that will have to be another day, the boys understand being on SSI and these days and times. But they definitely got an A on their project and also something usable for future use in case of power outage or we go camping etc. It is being powered by a 50-watt solar panel as well as a ac charger for those bad days or you just need to power it up quickly.

Awesome battery at a great price

Great company, great product. Fred is efficient and competent.

Battery arrived in great shape. Needs M5 x.8 screw for attachment of wires. Battery was deeply discharged to 5.8v I trickle charged with a 1 amp 12v constant current until battery indicated it was at 12V. I waited 2 hours to see if the battery would self discharge indicating damage, but no internal discharging occurred. Then I charged it with a lithium ion charger set to 14.5v @ 5A until it was full. Discharged measured capacity was about 27.2 AH which is close to the stated 28AH. Battery does not have a low voltage cutout, but all the equipment I plan to use it on will not function below 11V so no problem. I do like that the battery can be charged at a 15A rate. Using thermal imaging during charge/ discharge I observed no anomalies / hot cells or hot BMS circuitry, even when charging with 15A rate. Battery working as intended. Pros: inexpensive, functional, smaller than the competition, high discharge rate of 40A, charges fast at 15A rate. Cons: Screws not included for terminals, BMS no low voltage cutout to prevent deep discharge damage.