Datasheet

Product Specification Model No.: U421
Document Number: U421 Revision: 01 Page 2 of 5
Manufacturer reserves the right to alter or amend the design, model and specification without prior notice.
1. SCOPE
This specification governs the performance of the following USB Rapid Charger.
Model: U421
This is an USB rapid charger with 4 channels, as fast as 40mins for 2000mAh AA NiMH rechargeable batteries,
containing user-friendly LED indicators for battery checking.
All data specified are at room temperature 23 ; voltage and current are tested at the point of the input and the
batteries contact plates.
With multi protection:
 Over temperature protection (TCO).
 Reverse polarity protection
 Primary battery protection
 Timer cut-off
 -dV=5mv
2. RATINGS
Description
Specification
Input Rating DC5.0V / 1.0A - 2.1A
Output Rating Total number of independent channels : 4
Input : DC5.0V 2.1A
Per channel charging :
1xAA – DC1.4V 3600mA
2xAA – DC1.4V 1800mA
3xAA – DC1.4V 1200mA
4xAA – DC1.4V 900mA
1xAAA – DC1.4V 1500mA
2xAAA – DC1.4V 770mA
3xAAA – DC1.4V 510mA
4xAAA – DC1.4V 380mA
Charging Time Input DC5.0V 2.1A, 2000mAh AA or 800mAh AAA
1x(AA or AAA) – approx. 40 min.
2x(AA or AAA) – approx. 80 min.
3x(AA or AAA) – approx. 120 min.
4x(AA or AAA) – approx. 160 min.
Trickle Charge
Current
AA size : 1/10 charge current
AAA size : 1/10 charge current
Application - Independent charging channels for 1-4 pcs of Ni-MH AA/AAA rechargeable batteries
- Capacity checking for the first 10 seconds after battery insertion.
- Bad and primary cells detection during charging