Sony NP-BN1 Battery Charger with TP4056 module

[NextCurrent]

Hi everyone, here is a simple project for any kind of lithium battery than can be charged with the TP4056 module.
I've lost the charger for my Sony Cyber-shot DSC-WX7 camera so I decided to make one. The brain is the module that uses TP4056 chip and also the module has overcharging protection. ( you can find this module by this search: TP4056 5V 1A Lithium Battery Circuit Board Protection Board Charge Module )
Also you will need thin plywood, or carboard, or other materials available to you. You will need 2 springs from pen, or you can cut 1 in half so you have 2, two wires, some hot glue, 5V power supply or I use 5V micro usb phone charger and thats it.



Here is a video of it :

thanks for watching 

[magic]

The protection chip isn't needed because TP4056/TC4056 (a few version of this IC exist) is a dedicated Li-ion charger with proper charge termination. It will charge the cell to 4.2V and leave it there, as it should. I suppose the protected version of this board is intended for installation in devices with built-in battery, to prevent discharging below safe limits. That's what the separate battery and output connections suggest.

You may want to change the resistor which sets charging current. AFAIK something around 0.5C (half cell capacity per hour) is considered a good compromise between speed, safety and cell longevity.

[NextCurrent]

Yes you are right ! The protected version is to prevent discharging below safe limits on connections on the output terminals. Thank you for you info. 
This battery its rated at 600mAh. I've measured for fully discharged battery (~3.6V) the charging current is around 300mA, then when it's around 4V charged the charging current drops to around 200mA and the charging stops around 4.1V for this battery.

[magic]

This battery its rated at 600mAh. I've measured for fully discharged battery (~3.6V) the charging current is around 300mA

This might be due to resistance of the USB cable or limited performance of the USB port. Use different port/cable and you may end up pumping 1A into the cell, which is the default setting on most of those TP4056 boards. IIRC, charging times faster than 1 hour are not recommended for Li-ion.

[NextCurrent]

So I've tested this battery and other batteries (around 1000mAh) from older mobile phones with few different micro usb phone chargers (1 and 2A) , the charging current for this Sony battery was around 300mA but for the other batteries was like 700-800mA. Then I connected my bench power supply and measured around 100-200mA more charging current so yes i will need to change the programmed resistor that sets the charging current. Thanks