Futaba charger has a overnight wall charger that simultaneously charges NiCd transmitter and receiver batteries used with the 4PK. Separate LED charging lights. One year limited warranty through manufacturer. Futaba HBC-3B (4) Battery Charger with leads and plugs for transmitter and receiver batteries.When the charging 4PK batteries allow about 15 hours for charging. If battery has not been used for a while, cycle it by charging and discharging two or three times. Requires: Connecting to transmitter and receiver batteries and plugging into wall outlet