Tecno / Infinix BL-49NX Original-Capacity Replacement Battery (5000mAh)

The BL-49NX (commonly listed as BL49NX) is a high-density internal Lithium-ion Polymer replacement battery manufactured under the Transsion Holdings ecosystem. It serves as the primary powerhouse for Tecno’s incredibly widespread line of modern budget and “Go-series” entry-level devices. Since these phones run extensive social apps, background communication threads, and large displays, an aging factory battery exhibits distinct failure modes. Common warning signs include losing percentages rapidly once it drops below 30%, localized heat near the middle section during streaming, or getting trapped in an infinite boot-loop on the “Tecno” splash screen. Installing a premium BL-49NX cell safely restores native multi-day standby runtime.

• Battery Model: BL-49NT / BL49-NX

• Battery Type: Lithium-ion Polymer (Li-Po)

• True Capacity: 5000 mAh (Typical) / 4900 mAh (Rated)

• Standard Voltage: 3.85V

• Charging Voltage Limit: 4.4V

• Safety Integration: Built with an advanced double-IC Protection Circuit Board (PCB). This protects your logic board from irregular voltage spikes, balances structural safety during charging, and minimizes chemical gas expansion (bloating).

• Device Compatibility: This 5000mAh structural profile and precise flex ribbon connector lock natively to: