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