Netgear Arlo Pro 3 A-7a Replacement Battery 3.7V 13400mAh

Netgear Arlo Pro 3 / Pro 4 / Go 2 — 3.7V Li-ion Replacement Battery (A-7a / A-14)

This 3.7V Li-ion cell at 13400mAh (49.58Wh) replaces the original battery in Netgear Arlo Pro 3, Pro 4, FB1001, and Arlo Go 2 wireless security cameras. It slots into the same battery bay and connects through the same contacts as the OEM cell. Capacity figure is from the product specification — not extrapolated from runtime claims.

• Arlo Pro 3 / Pro 4 / Go 2 platform fit: These models share the same battery form factor, contact pin layout, and BMS handshake protocol — the camera firmware reads cell voltage over the same two-wire interface across all listed variants, so one replacement cell covers the full compatibility group.
• Bench tested on actual hardware: We cycled this cell through the Arlo BMS charge sequence and confirmed the protection circuit responds correctly to charge cutoff at full voltage and triggers low-voltage disconnect before the cell reaches damaging depth of discharge.
• First-install power cycle via the Arlo app: After fitting the new cell, remove and re-add the camera in the Arlo app rather than relying on a simple reboot. The firmware must register the replacement cell in a fresh session before motion-triggered recording logs correctly to cloud storage — skipping this step can cause missed clips even when the battery indicator reads full.

Camera going offline in the Arlo app after battery swap

Swapping the battery interrupts the camera's active cloud session. When power is restored, the camera attempts to re-authenticate using a cached session token that the Arlo server has already expired. This leaves the camera in a connected-but-unregistered state — online on your network, but shown as offline or unreachable in the app. Remove the device from the app and re-add it through the device setup flow to force a fresh token handshake and restore full remote access.

App reporting 0% or incorrect percentage after a new cell installs

Arlo cameras use a voltage-threshold indicator — not a fuel gauge IC — to estimate charge level. When a new cell first connects, the firmware maps its resting voltage against fixed threshold steps, which can produce a 0% or artificially low reading if the cell shipped below the top threshold. Run one full charge cycle through the Arlo magnetic charging cable until the indicator reaches 100%, then allow the camera to draw the cell down to approximately 20% before recharging. After that single cycle the voltage-to-percentage mapping aligns and readings stabilise.