Richard,
That Lossigy 20AH 12V LiFePO43 looks very interesting.
Includes a BMS inside, should be as easy to use as a lead acid battery.
Has 4x the Amp-hours of my Gooloo (though the Lossigy won't start my car!).
Web hits on "Lossigy" seem mostly positive.
A comparable Bioenno is nearly 4x the price.
Jerry, KE7ER
