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Battery Brand
Battery Brand
Brand: MT Star, Quality Beyond Comparison
4000mAh replacement battery for the Infinix S4 and Infinix Hot 7 Pro (battery model BL-39KX). BIS certified, original-size fit, made by MT Star.
Keep the Infinix S4 working for years with the MT Star BL-39KX. This 4000mAh battery is BIS certified and made to the same size and flex connector as the original.
| Battery model | BL-39KX |
|---|---|
| Compatible devices | Infinix S4, Infinix Hot 7 Pro |
| Capacity | 4000mAh typical / 3900mAh rated |
| Nominal voltage | 3.85V |
| Charge voltage limit | 4.35V |
| Battery type | Rechargeable lithium-ion polymer |
| Certification | BIS IS 16046 (Part 2): 2018 and IEC 62133-2: 2017 |
| Series | MT Star Premium Series |
Every MT Star Premium Series battery is made to the original size and connector, so it fits like the original. Each cell is BIS certified and tested for safe, stable output, and manufacturing defects are covered by easy returns.
The MT Star BL-39KX battery fits the Infinix S4 and Infinix Hot 7 Pro.
This MT Star replacement battery has a capacity of 4000mAh.
Yes. It's certified under BIS IS 16046 (Part 2): 2018 and IEC 62133-2: 2017 and is made to the original size and connector.
Yes. MT Star supplies distributors and repair shops across India. Contact us to become a distributor.
Common signs are fast draining, sudden shutdowns at 10-30%, heating while charging, or a swollen battery lifting the back panel.
