BaoFeng UV-3R charger repair
My Baofeng charger has just burned …
I didn’t want to buy a new one, it cost around 10$ … the batteries Baofeng is a Lion 3.7v 1500mAh, the good way is to replace the charger circuit with a another from Linear Technology, LTC4054-4.2, a resistor to set the charge current, one input capacitor, and a LED to look when the charge is over. Also, you can get the LTC4054 for free sample.
« »The LTC4054 is a complete constant-current / constant-voltage linear charger for single cell lithium-ion batteries. Its ThinSOT package and low external component count make the LTC4054 ideally suited for portable applications. Furthermore, the LTC4054 is specifically designed to work within USB power specifications. » »
Follow the shem bellow:
Ok, it’s dirty but work fine ! 🙂
The LED turn off when the charge is complete.
Useful – thanks. I was thinking of buying a UV3R+ but somewhat concerned about the charger. I shall worry less now and probably buy one!
Tks,
Same problem hear, so i go to change to this circuit.
If its hard to find (or soldering) you can find for 1$ on ebay a TP4057 lion charger circuit board.
dear sir,
Baofeng uv5RC uses 7.4V battery.
how could the shown circuit chatrge it?
original charger used a chio numbered « HXN-BS » an 8pin soic.Could you suggest a suitable replacement please.
Ebay sells a charger that just uses a single C9014 transistor