<https://www.hldstore.com/en/accessories/batteries/smart-6s-22ah/#product>
<http://schema.org/description>
"The smart escort, for safe flight, with bms for better comprehensive performance.\r\n\r\nBenefits and Features\r\n• Balance Charging: When charging, each cell's energy is automatically balancing. Full voltage of each cell is stable at 4.2v.\r\n• Battery Capacity Can Be Observed: Battery level is available from the BMS. Real-time power display.\r\n• Protection: Protect the li-ion battery from water erosion. Enhance battery life; improve the safety in use.\r\n• No Special Charger Required: Equipped with an XT90 adapter the regular charger can be used."
<https://www.hldstore.com/en/accessories/batteries/smart-6s-22ah/>