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CAT # BC-4056 (4 Reviews) Write a Review

$2.75 each
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Product Description
TC4056A charger for up to 1A Lithium Ion rechargeable battery. Input: 4.5-5.5Vdc. Suitable for USB-powered charger. Micro-USB input jack. 1.05" x 0.57".
Spec sheet available in PDF format.
WARNING: May cause cancer or reproductive harm.
California Prop. 65
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Customer Reviews (4 Reviews)

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Good board, inaccurate description

Reviewer: from New Mexico, USA

the units I received were different than pictured and described, but work fine and actually are better:

The pictured board has a mini-B USB power input, one IC, and connections for one battery to charge (+/-). The board I received has 3 IC's, micro-B input, and two output pairs, marked in Chinese and (+/-) each. My guess is that the added IC's add regulation and this nice feature: one output pair is for the LiPo/Li-ion batt to charge and the other output goes to the circuit you want to power; so that you can leave both outputs connected, and power the device while you charge -- actually a huge improvement over the board pictured.

I had to experiment to tell which set did what. It appears that pin 5 of the 4056 IC goes to the battery being charged, and the other pair goes to the device power. Note that + and - are oriented one way the battery side and opposite on the device side.

It would be helpful for All Electronics to give specs and diagrams for the breakout board they are selling rather than just the bare IC and describe it more accurately, (assuming the devices they currently sell are as I describe, and what I got wasn't a fluke). Also should clarify which resistor on the board needs to be changed to adjust max charging amperage. [I replaced R2 on the board with a 25K pot, and it seems to work, but have not thoroughly tested for output regulation.]

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Back for another....

Reviewer: from Northern Maine

Bought one based on the comment from the customer from New Mexico. Very satisfied with product, so I'm back for another. AND I agree completely with the customer from New Mexico.

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Wrong IC

Reviewer: from Eagle Rock Los Angeles CA

The IC is not an LTC4056. It is TP4056 ( copy of LTC4056 with difference pins)

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Contact ID

Reviewer: from SF Bay, CA

Tried to follow the advice for finding contacts for battery by pin # and still messed up. The symbol for battery cell is: 电池 Hope that displays OK and helps others.

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