Charging 440 mah lipo battery with tp4056 module is OK?

Thread Starter

cable1cutter

Joined Jan 21, 2023
7
I have a tp4056 li battery charger and I ordered a 440 mah lipo battery. Is it OK to chare battery with this or will be the current too much for battery? Do I need to modify module?
 

Ya’akov

Joined Jan 27, 2019
8,483
The module will be fine if it‘s charge current is set to 1A or less. More than 1A is “OK” but will tend to reduce battery life.
 

Audioguru again

Joined Oct 21, 2019
6,429
Most of my Li-PO batteries have two cells in series and 3 wires. My charger matches them.
How many cells are in your battery and are they in series or in parallel?
 

Thread Starter

cable1cutter

Joined Jan 21, 2023
7
The module will be fine if it‘s charge current is set to 1A or less. More than 1A is “OK” but will tend to reduce battery life.
I searched some and find datasheet and I think I should charge it with at most 440 mah and I must change the charging current by changing the resistor at tp4056 module. If I am wrong correct me pls.
 

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Audioguru again

Joined Oct 21, 2019
6,429
Your battery has a single cell. A TP4056 module might need to have its charging current reduced.
The datasheet says the "standard charge" is 0.5C (220mA) and the "fast charge" is 1C (440mA).
Using standard charge current the battery will have more charge-discharge cycles than using fast charge cycles.

The number of cycles and the capacity will be reduced if the battery is always near a full charge. A storage charge (and the selling charge in a store for a long time) is usually 3.7V.
 

Ya’akov

Joined Jan 27, 2019
8,483
I searched some and find datasheet and I think I should charge it with at most 440 mah and I must change the charging current by changing the resistor at tp4056 module. If I am wrong correct me pls.
The resistor on pin 3 (PROG) determines charge current. Most modules use a 1.2KΩ resistor which makes gives you 1A charge current. If you replace it with a 3KΩ resistor you’ll get 400mA charge current.
 

Thread Starter

cable1cutter

Joined Jan 21, 2023
7
The resistor on pin 3 (PROG) determines charge current. Most modules use a 1.2KΩ resistor which makes gives you 1A charge current. If you replace it with a 3KΩ resistor you’ll get 400mA charge current.
Okay, I replaced it with 4.4k resistor (it was nearest I could find). I assume it should give between 250 to 300 mah but resistor was not at exact point, is it a problem or OK?
 
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