The AA-VC20U Dual-Battery Charger simultaneously charges two JVC BN-VC296G and/or BN-VC2128 lithium-ion batteries, confirming charge status via an LED indicator next to each battery slot. The LED turns from red to green when the battery is charged, and it blinks red if charging stops due to an error. The charger connects to a power outlet with an included AC adapter and supports 100 to 240V worldwide power input (an appropriate plug adapter would be required outside of North America).