BLP571 3100mAh 3.8V Li-ion Polymer Replacement Battery for OnePlus One A0001 Flagship Smartphone

The BLP571 3100mAh battery for OnePlus One has a capacity of 3100mAh (11.78Wh) and a rated voltage of 3.8V, with a charge limit voltage of 4.35V. This BLP571 3.8V 3100mAh Li-ion Polymer battery is built with grade A cells and is CE, RoHS, and UN38.3 certified. Unlike modern OnePlus phones that support Dash Charge or Warp Charge, the original OnePlus One supports only standard 5V/2A charging (10W maximum). A full charge from 0% to 100% takes approximately 2-2.5 hours with a standard charger. For OnePlus One 3100mAh battery performance, expect 4-5 hours of screen-on time for web browsing and social media, 3-4 hours of gaming (depending on the title), and 8-10 hours of music playback. Standby time with this battery is excellent — the OnePlus One can last 3-5 days on a full charge with light use. The phone does not support any fast charging protocols (no Quick Charge, no Dash Charge), which is actually beneficial for long-term battery health since slower charging generates less heat and reduces degradation over time.

The OnePlus One battery replacement process is moderately difficult. Unlike modern sealed phones, the OnePlus One has a removable back cover (sandstone black, pops off with a fingernail at the bottom corner). However, the battery itself is not user-swappable — it sits under a metal shield and is lightly adhered. To replace OnePlus One battery A0001: 1) Remove the back cover. 2) Remove all visible screws (use a PH00 screwdriver). 3) Use a plastic spudger to separate the midframe. 4) Disconnect the old battery's small 2-pin connector by pulling the plug (not the wires). 5) Lift the old battery (it is lightly adhered). 6) Place the new BLP571 battery, connect the connector, then reassemble in reverse order. Third-party repair shops typically charge $15-25 for labor. For OnePlus One battery health maintenance: 1) Use only a standard 5V/2A charger — do not use Quick Charge or PD chargers as the OnePlus One's charging circuit is not designed for them. 2) Keep battery level between 20% and 80% for daily use to maximize the lifespan of this 3100mAh battery. 3) Avoid exposing the phone to high temperatures (above 40°C / 104°F) — the sandstone back cover offers good grip but doesn't dissipate heat as well as glass or metal. 4) For long-term storage (over 2 months), keep the battery at approximately 60% charge. 5) Perform a full calibration cycle after installation: drain the phone until it auto-shuts off, then charge uninterrupted to 100% using a standard 5V/2A charger. For OnePlus One battery replacement guide and health tips, this calibration helps the device accurately report battery percentage in CyanogenMod or custom ROMs. Stop using immediately if the battery shows any swelling. Many OnePlus One owners are running custom ROMs like LineageOS — this battery works perfectly with all custom ROMs.