3pcs 5V 2.1A Output UPS Power DIY Charger Board Step Up DC to DC Converter Module for 3.7V 18650 Lit

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Specifications:

Charge voltage : DC 5V ( 4.6V-6.5V )

Charging current : 0-1A

Full charge voltage : 4.2V±2%.

Led indicator : OK LED is fully charged OR battery failure indicator; CR LED is charge indicator.

Discharge current : 0-3.5A;

Discharge quiescent current : 200uA

Discharge conversion efficiency : 78%-91%

Output current : 0-2.1A(5V);

Operating ambient temperature : -40 to +85

Storage temperature : -65 to +125

Size: 28 x 18 x 6.3mm

Weight : 2.7g

Note:

1. This module without lithium battery over-discharge protection.

2. In order to achieve more than 5W, it is recommended to use two or more batteries in parallel.

Applications: