This is a Toply brand rechargeable Lithium-ion battery pack.It utilizes 18650 cells arranged in a 2S1P configuration, delivering a nominal voltage of 3.7V (or potentially 7.4V depending on specific wiring).The pack has a high capacity, likely 6900mAh, and features a JST connector for charging and discharge.Typical applications include toys, home appliances, and consumer electronics