Hi there,

The Whisperer 2 features an integrated rechargeable battery designed to last for years. While the unit is sealed for waterproofing, the battery is not user-replaceable.

However, if your battery is low, you can manually recharge it via the USB port located under the grey rubber plug on the back. Once fully charged, the solar panel should help maintain the power.

If it still won't hold a charge, please email us at support@netrohome.com for further assistance.

Best regards,

Candice

Netro Inc