TecMate Optimate Lithium 4-bank x 4s 0.8A Battery Tender The 4 bank OptiMate Lithium 0.8A 4S charges up to 4 x LiFePO4/ LFP (Lithium) 4-series batteries. Each bank charges independently your powerful Lithium-ion batteries.  - Charging Amps: 0.8A (per bank).- Saves low voltage Lithium-ion Batteries.- Ideal for LiFePO4 (Lithium) 4 series cell 12.8V / 13.2V batteries from 2 – 30Ah.- Weatherproof case with wall mounts.- Can be used for both indoor/ outdoor (lowest temperature: -20°C).- Included: 6ft / 180cm ACsupply lead and 4 x 6ft / 180cm charge lead ending in SAE connector. 4 x weatherproof battery lead&4 x standard battery clip set. No risk of overcharging. Totally safe for vehicle electronics. Sparks suppressed. Safe for long-term battery maintenance. Automatic shut-down if short-circuited or battery disconnected. - Tecmate Optimate Lithium X 4 Size