PB-42XM: 7.4 volt 4540mAh rechargeable Li-ION battery for Kenwood TH-F6A, TH-F6E, TH-F7 radios. Exclusive product. Made with higher-capacity cells for improved running time and high-watt power! The PB-42XM re-charges thru radio with stock wall charger, or with our WC-42 Wall Charger, or in a Desktop drop-in rapid charger (EMS-42K series). Battery is approximately 0.9" thick. Pricing is for 1 battery pack.