Estry Li3945T44P8H906455 Standard Battery for Nubia Red Magic 6 NX669J

Replacement Battery for Nubia Red Magic 6

This Estry lithium battery replaces the original Li3945T44P8H906455 pack in the Nubia Red Magic 6 NX669J. It supplies a nominal 3.85V and a rated capacity of 5000mAh. The single-cell unit weighs 121.0g and measures 88.25 x 63.1 x 5.4mm. It is intended for owners whose factory cell no longer holds a usable charge.

Drop-in Fit with Built-in Protection

The cell matches the OEM footprint, so it seats in the existing battery cavity without adapters or case modification. Integrated circuitry guards against overcharge, over-discharge, over-voltage and short-circuit events. No external charger or additional wiring is required; the phone’s own management system handles balancing and fuel-gauge reporting.

Steady Output Through Extended Sessions

Under continuous load the protection circuit maintains stable voltage delivery while the 4850mAh typical capacity sustains runtime. The pack carries ISO9001, RoHS, CE, UN38.3 and MSDS certifications, confirming consistent manufacturing quality. It is not suited for devices other than the listed Nubia model or for users seeking a higher-capacity alternative.