KytanDale
Mod Resurrection Specialist!
- Joined
- May 30, 2019
- Messages
- 773
Hi apes,
I got today a new toy, and after charging a pair of cells I decide to have a look inside. @fogstar , no need to worry, I will not ask for warranty as of now [emoji16] .
The device is well built, good case, the lcd light LED has a small bright spot on a corner but that is to be expected, maybe just my ocd. The springs on the contacts are quite snappy, be careful on fingers and battery wraps.
It is build around and MCU that has no part code on it, quite normal as people steal designs. Mirrored charging circuit, good soldering and good parts. The control mosfets are 30v and 4A, for a 0.5A/cell charger it is ok although I kinda wanted to see a bit of overkill here. The reverse polarity is done with Schottky diodes, by the part number ( i hate decrypting smd codes) they seems to be specialised diodes for reverse polarity protection.
I loved the fact that it barely gets warm ( somehow expected at 0.5A per cell charge) it points that the circuit is sized correctly.
The charging current goes down as the cells are almost full, and the cut-off voltage seems to be around 4.19v. Once the cells are full it barely draws anything, I was to lazy to put a proper multimeter instead of the usb meter, the meter showed 0 but I would expect a few mA to run the circuit and power the display but it does indicate that it cuts the cells once full. When fully charging it draws between 0.8A to 1.1A with 2 cells. Did not try only 1 cell.
The only thing I noticed, and maybe I don't understand how it works ( looping @XTAR in for info) is that the current indicator is stuck at max , 0.5A , even when the cells are almost full and the whole charger draws 0.2A, that meter is still at 0.5 amps. Maybe it will change when charging a small mA/h cell but not sure if it is a bug or I did not test the right setup.
Tested with some spare efest cells and my trusty samsung 2A charger. The usb meter, although a cheap thing it was tested on a calibrated multimeter and it is accurate.
Hope you guys like it and it is useful.
I would easily recommend this charger. It is slow but ot it seems well built and does what it says. [emoji6]
I got today a new toy, and after charging a pair of cells I decide to have a look inside. @fogstar , no need to worry, I will not ask for warranty as of now [emoji16] .
The device is well built, good case, the lcd light LED has a small bright spot on a corner but that is to be expected, maybe just my ocd. The springs on the contacts are quite snappy, be careful on fingers and battery wraps.
It is build around and MCU that has no part code on it, quite normal as people steal designs. Mirrored charging circuit, good soldering and good parts. The control mosfets are 30v and 4A, for a 0.5A/cell charger it is ok although I kinda wanted to see a bit of overkill here. The reverse polarity is done with Schottky diodes, by the part number ( i hate decrypting smd codes) they seems to be specialised diodes for reverse polarity protection.
I loved the fact that it barely gets warm ( somehow expected at 0.5A per cell charge) it points that the circuit is sized correctly.
The charging current goes down as the cells are almost full, and the cut-off voltage seems to be around 4.19v. Once the cells are full it barely draws anything, I was to lazy to put a proper multimeter instead of the usb meter, the meter showed 0 but I would expect a few mA to run the circuit and power the display but it does indicate that it cuts the cells once full. When fully charging it draws between 0.8A to 1.1A with 2 cells. Did not try only 1 cell.
The only thing I noticed, and maybe I don't understand how it works ( looping @XTAR in for info) is that the current indicator is stuck at max , 0.5A , even when the cells are almost full and the whole charger draws 0.2A, that meter is still at 0.5 amps. Maybe it will change when charging a small mA/h cell but not sure if it is a bug or I did not test the right setup.
Tested with some spare efest cells and my trusty samsung 2A charger. The usb meter, although a cheap thing it was tested on a calibrated multimeter and it is accurate.
Hope you guys like it and it is useful.
I would easily recommend this charger. It is slow but ot it seems well built and does what it says. [emoji6]
