... in flight or during charge 2,battery low voltage alarmer 3,for 1-6S lithium packs 4,we also offer balance chargers SpecificationBattery ... each cell voltage of 2-6S lipo/Li-fe/Lion battery packs, display the total voltage and difference between each cell at ... , or over 4.22V in charging.Available for all types lixx battery CellMeter6, battery checker (for 2-6S lipo/lion/Li-fe packs) Popular item!!!