Battery Bl 4s

The BL-4S battery is a legacy lithium-ion model primarily designed for mid-tier Nokia S40 devices and feature phones Alibaba. While the original equipment manufacturer (OEM) market for these batteries has matured into a replacement-driven landscape, steady demand persists among collectors and users of durable legacy mobile hardware NordsonAlibaba.

1. Technical Specifications

Modern replacement BL-4S batteries typically feature enhanced capacities compared to early legacy units Alibaba.

* Capacity: Ranges from 860 mAh (legacy) to 1020 mAh (modern high-capacity replacements) MirahezeAlibaba.

* Voltage: Standard 3.7 V (nominal) with a 4.2 V charging limit BatterymartAlibaba.

* Dimensions: 49 × 34 × 5.2 mm. Note that it is not interchangeable with physically similar models like the BL-4C or BL-5C Alibaba.

2. Market Trends & Consumer Insights

* Quality Stratification: The market is divided between high-quality authorized replacements ($12–$32) and low-cost unbranded units ($4–$9) Alibaba.

* Consumer Pain Points: A primary issue reported by consumers is the prevalence of counterfeit units that lack the necessary 12 kΩ ID resistor, causing "Battery Not Supported" errors on Nokia hardware Alibaba.

* Stability Over Performance: Modern buyers prioritize thermal stability (remaining below 42°C) and cycle life (300–500 cycles) over aggressive capacity claims, which are often indicators of fake units Alibaba.

3. Sourcing & Pricing

Bulk sourcing for BL-4S batteries remains highly cost-effective, with units available for as low as $1.12–$1.26 at low MOQs (Minimum Order Quantities) of just 2 pieces Alibaba.

* Lead Suppliers: Companies such as Shenzhen Chuangyihe Technology provide high-volume availability with white-label specification options Alibaba.

* B2B Landscape: Total order transactions for top suppliers in this category exceed $20,000+, indicating active liquidity in the replacement parts market Alibaba.

I have compiled a list of current B2B product offerings for the BL-4S battery, including pricing, MOQs, and supplier locations, in the file below.