Lithium-ION 7.4 volt are available in either 3500mAh 2s1p 2-cell OR 7000mAh 2s2p 4-cell packs. (3-cell 11.1 volt packs also available in EXB version only). Discharge max 2c (two times capacity) and maximum charge rate is 1c. Rugged and compact with great capacity to weight. Can be charged as lithium-ion or polymer. Built in pressure vents and thermo fuse in each cell for added protection. Choose from either SENTINEL (Internal Balance) or EXB (External Balance).
The term SENTINEL identifies a battery that has the balance low voltage warning circuit built onto the pack. The SENTINEL replaces the older PLUS version. (click on Internal Balance below for more information)
The EXB version of DURALITE batteries does not have a circuit for balancing or low voltage warning. It relies on the charger to do the balancing when being charged. (click on External Balance below for more information)