The TP4056 module charges single lithium cells from 5V micro USB at 1A. It charges with a constant current, then a constant voltage, and stops at 4.2V. The single module costs $1.49, and the 5-pack costs $14.99. Never charge series packs on a TP4056, since it charges one cell only.
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How does the TP4056 charge a cell?
The TP4056 is a linear charger for a single lithium-ion cell.
It starts with constant current, then holds 4.2V while the current falls.
The chip ends the charge when the current falls to one tenth of the set value.
How much current does it deliver?
The module charges at up to 1000mA from a 5V micro USB supply.
The charge current is set by a single resistor on the board.
A 1.2k resistor sets 1A, and a 2.4k resistor sets 500mA.
What happens with a deeply flat cell?
A cell below 2.9V gets a low trickle charge first.
The trickle charge brings the cell up safely before full current starts.
The 2.9V threshold is fixed in the chip, so no setting is needed.
Single module or 5-pack?
The single module costs $1.49 for one charging board.
The 5-pack costs $14.99 and covers several projects at once.
The 5-pack is the upsell on the single, and the single is the cross-sell on the 5-pack.
What did we check on the bench?
We matched the 4.2V fixed voltage and 1A current to the datasheet.
We matched the 5V micro USB input and single-cell limit to the listing.
We counted 1 image on each of the two listings.
Quick comparison
| Option | Input | Current | Stops at | Price |
|---|---|---|---|---|
| Single module | 5V micro USB | Up to 1A | 4.2V | $1.49 |
| 5-pack | 5V micro USB | Up to 1A | 4.2V | $14.99 |
Steps
- Connect the cell with the correct polarity.
- Connect a 5V micro USB supply that can deliver 1A.
- Let the module charge with constant current, then constant voltage.
- Wait for the chip to end the charge at 4.2V.
- Disconnect the cell when the charge ends.
Frequently asked questions
Can I charge a 2S or 3S pack on a TP4056?
No. The TP4056 charges one lithium cell only. Never charge series packs on it.
How do I change the charge current?
The current is set by a single resistor on the board. A 1.2k resistor sets 1A, and a 2.4k resistor sets 500mA.
What happens if the cell is below 2.9V?
The chip trickle-charges the cell first, then starts full current once the voltage rises.
What USB supply do I need?
A 5V micro USB supply that can deliver 1A.
Parts used
TP4056 5V Micro USB 1A Lithium Battery Charging Module (1 Pack), $1.49
TP4056 5V Micro USB 1A Lithium Battery Charging Module (5 Pack), $14.99
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Browse all the guides on the Quality RC Parts Drone Guides hub, or start at the Quality RC Parts store.
Sources
Quality RC Parts stocks parts in New York, USA and ships in-stock orders in 1-2 business days.
Last updated: 2026-11-11.