Grin Technologies' universal programmable charger for 36V to 72V electric bike and scooter batteries. Programmable output charges at up to 5 amps. Twice as fast as most battery chargers. Adjustable output voltage can be tuned for partial charging and maximum cycle life with lithium packs. Supports all Lithium, Iron Phosphate (LiFePO4), Lead Acid, and NiMH / NiCad chemistries.