WC-55041 : Wall Charger for 9.6v Sea Ranger Battery pack, for Sea Ranger handheld. This Wall Charger plugs into the DC Port on the battery. Other end plugs into wall outlet.  Output is 12VDC @ 200mA. Plug is coaxial 5.0mm x 2.1mm, center POS(+). Cross reference # PV5504140A. Re-charges the battery pack overnight (battery has built-in Current reduction circuitry, which facilitates slow-charging). Note: This wall charger should only be plugged into battery packs that are healthy, with confirmed voltage.  If your battery is old are non-functioning, nothing is going to restore it until the internal battery cluster is replaced.