Arsenal 2's battery is not user-replaceable. This is a decision we weighed carefully and ultimately concluded that the importance of making Arsenal 2 durable and affordable outweighed the advantages of a replaceable battery.
To address the need for extending shooting time and device lifespan, we designed Arsenal 2 so that it can be charged while in use. By using external USB battery packs (not included), you can shoot with Arsenal 2 indefinitely. These are affordable and can be easily recharged and replaced as needed. You can even recharge them using solar power on extended trips.