Tecmate TM-291 Lithium Battery Saving Charger/Tester/Maintainer (4S 5A - 10-Step 12.8V/13.2V 5A) Ultimate professional diagnostic charger & tester for LiFePO4/LFP batteries; Saves low volt LiFePO4 batteries, Specialized LiFePO4 charge maintain cycle, Amp Matic charge mode adjust for battery size IDEAL FOR: LiFePO4 (LFP) 4 series (12.8V-13.2V nominal voltage) batteries from 2 - 100Ah SAVE : Low Volt Start of 0.5V + 3-step low volt SAVE and TEST; battery BMS reset USE: Indoor/Outdoor (lowest temperature:-4 Degree/-20 Degree); STYLE: WP case with wall mounts, 6ft/180cm AC supply lead & 6ft/180cm charge lead ending in SAE conn; WP battery lead & STD battery clip set Incl INPUT: Global (100-240V 50-60Hz), high efficiency (CEC listed), fully sealed Ultimate LiFePO4 professional level battery charger; High efficiency diagnostic charger and tester for LiFePO4 / LFP batteries; Perfect for charging and seasonal maintenance of a 12.8V-13.2V LiFePO4 / LFP battery sized from 2 to 100 Amp-hour; SAVE : Low Volt Start of 0.5V + 3-step low volt SAVE and TEST; CHARGING AMPS: 5A (AmpMatic) IDEAL FOR: LiFePO4 (LFP) 4 series batteries from 2 - 100Ah; INPUT: Global (100-240V 50-60Hz), high efficiency (CEC listed), fully sealed; USE: Indoor/Outdoor (lowest temperature: -40 / -40 ); STYLE: Weatherproof case with wall mounts, with 6ft/180cm AC supply lead and 6ft/180cm charge lead ending in SAE connector; Weatherproof battery lead and standard battery clip set included;