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.
If you'd like to purchase the Power Bank we offer you can do that here. Or if you are having trouble with your Arsenal 2 battery please reach out to our friendly support team directly.