This IMPRES 2 Li-Ion, 4850mAh, UL2054 DIV2 battery is IP68 rated, which means it can be fully submersed in two meters of water for up to four hours. Designed with a rugged housing, this battery is as tough as the radio. IMPRES 2 batteries, when combined with an IMPRES 2 charger, deliver up to 60% more charging cycles than traditional Lithium Ion batteries. We have extended our capacity warranty from 18 to 24 months, and offer a 48-months workmanship warranty. IMPRES 2 batteries are compatible with all existing IMPRES chargers, so your upgrade will be a smooth one.