3100mAh 3.7V Li-ion Polymer Replacement Battery for Anbernic RG28XX Handheld Console

Description

Battery model: For Anbernic RG28XX
Capacity: 3100mAh
Rated voltage: 3.7V
Charge limit voltage: 4.2V
Battery type: Li-ion Polymer (Grade A cells)
Compatible with: Anbernic RG28XX, Anbernic RG 28XX
Package include: 1 x battery
Keep your Anbernic RG28XX running at full capacity with this 3100mAh Li-ion Polymer replacement battery. The RG28XX is a compact, entry-level retro handheld featuring a 2.8-inch IPS screen and an Allwinner H700 processor. It is designed primarily for PlayStation 1, N64, Dreamcast, and below emulation, as well as portable PICO-8 development. This battery matches the original cell’s dimensions and uses the correct small 2-pin micro connector — critical because the RG28XX’s small form factor leaves very little tolerance for off-size batteries.
Technical Details for RG28XX Owners: This 3100mAh replacement battery for Anbernic RG28XX maintains the original 4.2V charge termination voltage and uses low-resistance cells to ensure stable power delivery during emulation. The RG28XX’s Allwinner H700 processor draws consistent current whether you’re playing Game Boy Advance, PlayStation 1, or SNES titles. The built-in protection circuit module (PCM) guards against over‑charge, over‑discharge, short circuit, and over‑current. CE, RoHS, and UN38.3 certified for safety. For best longevity, avoid frequently draining the battery below 10% — lithium-ion cells prefer partial discharges. Compared to the original battery, this grade A cell provides similar runtime and voltage stability.
Step‑by‑Step Installation Guide for RG28XX: 1) Power off the device completely. 2) Remove the four small Phillips screws on the back (use a PH00 screwdriver). The RG28XX has a simple clamshell design with no hidden clips. 3) Gently lift the backplate starting from the bottom edge — the battery is located in the lower half of the mainboard. 4) Use a plastic spudger to carefully lift the original battery (it is lightly adhered with double-sided tape). 5) Disconnect the old battery’s connector by pulling the plug (not the wires). 6) Connect the new battery — the small 2-pin connector is keyed and only fits one way, do not force it. 7) Place the new battery in the compartment, ensuring the cable is not pinched by the backplate. 8) Reassemble the backplate and screws. 9) If the device doesn’t power on after reassembly, leave it connected to a 5V/2A charger for 10‑15 minutes to activate the protection circuit.
Compatibility Note: Fits Anbernic RG28XX and RG 28XX only — not compatible with RG35XX, RG40XX, RG CubeXX, or other Anbernic models. The RG28XX is distinguished by its small 2.8-inch screen, compact horizontal form factor, and dual-microSD card slots. Before ordering, please open the back panel to confirm your battery’s connector type and cable routing. If your RG28XX battery drains quickly, the console shuts down unexpectedly when the indicator still shows charge, or the battery has swollen, this RG28XX battery replacement is the correct choice.
Battery Care for Handhelds: For maximum lifespan, keep battery level between 20% and 80% for daily use. Do not use Quick Charge (QC) or Power Delivery (PD) fast chargers — only use a standard 5V/2A charger. The RG28XX’s charging circuit is not designed for fast charging protocols. If storing the device for more than 2 months, keep the battery at approximately 60% charge. Avoid leaving the RG28XX in hot environments (e.g., inside a car in summer) — heat accelerates battery degradation. Stop using immediately if the battery shows any swelling. For optimal RG28XX battery care, perform one full discharge-recharge cycle after installation to help the device calibrate battery level reporting.