Kunkune

USB and micro USB Charge Discharge Board

USB and micro USB Charge Discharge Board

USB and micro USB Charge Discharge Board - Main image
$1.11 $1.5 In stock

Category: Lithium Polymer Batteries

Lithium Polymer charging board with USB and micro USB

Charger Model: 134N3P

Description:

Usable batteries: 18650 batteries, mobile phone batteries, tablet batteries, MP3 batteries and other 3.1V-4.2V polymer lithium batteries,
(note: parallel connection increases capacity, series connection increases voltage, and can only be used in parallel!)
Not suitable to use with: dry batteries, accumulators, 1.2V rechargeable batteries, nickel-metal hydride batteries, 3.2V iron-lithium polymer lithium batteries, etc.

Small size supports charging and discharging Overcharge and over discharge protection
Input port: Micro USB
Input requirements: 5V constant voltage power supply can be used as charging input power
Output port: USB
Output parameters: 5V1A

Attention

1. The batteries must be connected in parallel, and the voltage must be between 3.2-4.2V to work.
Suitable for 18650 flat-head and polymer batteries;

2. The battery connected to the motherboard positive to B+ ,negative to B-, if not connected correctly, the resistance will be burned out;

3. It is not recommended to mix old and new batteries, batteries with high internal resistance, and batteries with large capacity gaps.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Please contact us for the refund processing timeframe before returning an item.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Return arrangements

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.0 / 5 · 5 reviews)

Emma ★★★★★

The dual USB and micro USB inputs are super handy—I can top up my 18650s with whatever cable’s lying around, and the 3.1V-4.2V range covers all my spare phone batteries without fuss. Charging feels steady and reliable, no overheating or weird cutoffs after a week of daily use.

Emily ★★★★★

Charged an old 18650 I had lying around in under an hour, and the USB input meant I could use any wall adapter I already own. The 3.1V-4.2V range handled my phone battery without any issues. Exactly what I needed for a quick DIY power bank.

Lily T. ★★★★☆

I’ve been using this to top up an old phone battery I pulled from a drawer, and the 134N3P board handles the 3.7V range without any fuss. It’s not the fastest charger out there, but it does the job reliably with both USB and micro USB cables. Just wish the board came with a case since it’s a bit exp