ACR RB16V Rechargeable Lithium-Ion Battery [4589]RB16V Rechargeable Lithium Ion Battery The RB16V is a rechargeable Lithium Ion battery intended for everyday use of the SR303 radio. This battery is not included when the SR303 is purchased as an Emergency Radio (p n 4586). When the SR303 is purchased as an Emergency Radio Full Kit (p n 4587), then the RB16V rechargeable battery is included along with the LB15V primary non rechargeable battery. The RB16V is not included when the SR303 radio is