About this replacement
Amazon Kindle 7th Generation — 3.7V Li-Polymer Replacement Battery (MC-265360-03)
This is a 3.7V, 890mAh Li-Polymer replacement battery for the Amazon Kindle 7 (7th Generation), including model WP63GW and the Kindle 499 series. It replaces OEM part numbers MC-265360-03, 58-000083, and 58-000151. Fits the standard 6-inch e-ink Kindle that charges via micro-USB and runs the basic Kindle OS.
- Kindle 7 platform fit: These models share a single battery form factor — 61.60 x 53.32 x 2.78mm — with a matching connector and BMS handshake voltage. Swapping between WP63GW variants does not require a different cell.
- Bench tested on actual hardware: We ran this cell on a Kindle 7 unit and confirmed the BMS accepted the cell without fault codes, charge acceptance was normal from 3.0V upward, and the firmware reported battery percentage within one full charge cycle.
- First charge after cell swap: Connect via USB immediately after installing and run a complete charge cycle before use. The Kindle 7 firmware recalibrates its battery percentage display against the new cell during this first full charge — skipping it causes inaccurate readings for weeks.
Why your Kindle 7 shows 100% then drops to 20% within minutes of a battery swap
The Kindle 7 firmware stores a charge curve profile from the old cell. When a new cell goes in, the firmware is still reading against the old profile. This creates wildly inaccurate percentage jumps until the system re-maps the new cell's discharge curve. The fix is straightforward: charge the device fully to 100%, then use it until it shuts off automatically, and charge again to 100%. After that one discharge-recharge cycle, the percentage display stabilises.
Kindle 7 not powering on at all after battery replacement
Li-Polymer cells ship at storage voltage — typically around 3.6V — which can sit below the Kindle 7's minimum boot threshold if the unit has been sitting unused. The BMS will block power delivery until the cell reaches approximately 3.7V. Plug into a USB charger and leave it connected for 10 minutes before pressing the power button. If the charge LED does not light, check that the connector is fully seated — the ZIF-style cable on the Kindle 7 board unseats easily during installation.