Arjo battery pack for Tenor lift - Arjo battery pack for Tenor lift consist of sealed lead-acid batteries mounted to the control box. The battery pack assembly consists of two 12-volt each, 4 Ah (24 volts capacity). Battery life is influenced by proper charging practices and load exertion. Lead-acid battery packs are not subject to a memory effect. Therefore, they need not to be completely drained before being recharged.