These 4S 2200mAh 30C Lithium-Ion/Li-Ion battery packs are hardshell and water resistant making them perfect for use across all applications, especially as replacements for old LiPo packs used in RC hobby drones, planes, cars and boats. They have a built in balance lead for safe charging and come standard with a T-plug/Deans connector. Their voltage ranges from 14.8V - 16.8V when fully charged, being Li-Ion they can output high amounts of surge current for extended periods of time and are capable of fast charging. These packs are Australian made with shipping times varying based on buyer location. *Charging via a dedicated Li-Ion/LiPo balance charger is recommended* DO NOT OVERCHARGE, SHORT CIRCUIT, OVER-DISCHARGE OR DISASSEMBLE. ALL SALES ARE FINAL WITH NO REFUNDS AVAILABLE.