Import 3.7v Adjustable Lithium Battery Usb Charger — Buy in wholesale FOB from Supplier in China

This module is a single-cell lithium-ion and lithium-polymer battery charger designed around the TP4056 linear charging IC, accepting 5V input through a standard USB-A port and delivering adjustable constant-current and constant-voltage charging to 3.7V nominal cells. The TP4056 typically supports charge currents from 100mA up to 1000mA set via an external resistor, with built-in thermal regulation and automatic charge termination when current drops to 1/10 of the programmed value. Common implementations include reverse polarity protection and battery temperature monitoring via a thermistor input, though buyers should confirm which features are populated on Newbatteria Electronic Company's specific variant.

The PCB integrates the TP4056 IC, programming resistor, charge status LEDs (red for charging, green for complete), and USB-A input connector with standard 2.54mm pin headers for battery and output connection. Typical applications require a 5V/2A USB source; lower current adapters will extend charge times proportionally. The constant-voltage phase holds at 4.2V±1%, with trickle-charge activation below 2.9V cell voltage for deeply discharged cells. Thermal foldback reduces charge current if die temperature exceeds approximately 120°C, preventing damage under marginal thermal conditions.

Target markets include portable electronics manufacturers, IoT device builders, repair shops, and DIY electronics distributors who need reliable, low-cost charging for single-cell Li-ion or Li-Po packs. The adjustable current setting allows trade-offs between charge speed and cell longevity, with 500mA being typical for 500-1000mAh cells and 1A for larger capacities. Buyers should confirm with Newbatteria Electronic Company regarding available current variants, whether the module includes battery protection (over-discharge, over-current, short-circuit) or requires external PCM, and bulk packaging specifications.

Newbatteria Electronic Company is located at No.14 Longtian Lane, Kengzi Town, Pingshan District, Shenzhen 518100, Guangdong, China. The supplier holds a harbor trust tier with a 0.00% response rate and zero recorded average response hours, indicating limited active engagement data in the current profile. No manufacturing scope, company size, registration details, or quality certifications are provided in the available source material.

The listing targets B2B buyers in portable electronics, IoT, and consumer goods assembly sectors seeking USB-based lithium battery charging modules. Without response metrics or verification signals, direct communication with the supplier is essential to assess capabilities. Buyers should not assume vertical integration or in-house PCB fabrication; many Shenzhen-area trading companies source modules from local PCB assembly houses. Due diligence on actual manufacturing location and quality control processes is recommended before volume commitment.