I have bought quite a few these from Walmart brand Black-Web battery pack quite a few times before (with the four LED light that indicates charge level runs on 4.2 volts ) but this one is a little different ( this one has the percentage of change which runs on 8.4 volts ) in 95% of them run off of 4.2 volts but this one runs off of 8.4 volts
One note I have two of them and I would not recommend taking them apart until you run the battery pack down to 0%
This is going to make a project that I want to do is going to be a lot easier with this power supply board
One note the battery packs that run off of 4.2 volts has a plastic housing
( easy to take apart )
The battery pack that runs off of 8.4 volts has a aluminum ( housing this battery pack is very hard to come out because of the glue that they use to keep the battery in place )
You have to cut the front of aluminum case a long each side in the middle of the rounded sides ( not to deep into the case just enough to cut the metal ) about a 1/4
( this is with two 18650 in series as a guide from the end that does not have the display )
of way down on each side and pry on top of plastic circuit board case until you can see that the glue has released from the case on top and bottom of the batteries
( the end that has the display board )
to release the glue so batteries can come out you MUST take your time doing this step and not be in a hurry or you will have an accident if you are not careful the one nice thing about the way they put this circuit board it is in a plastic case this the only reason I try to get it apart
One note I have two of them and I would not recommend taking them apart until you run the battery pack down to 0%
This is going to make a project that I want to do is going to be a lot easier with this power supply board
One note the battery packs that run off of 4.2 volts has a plastic housing
( easy to take apart )
The battery pack that runs off of 8.4 volts has a aluminum ( housing this battery pack is very hard to come out because of the glue that they use to keep the battery in place )
You have to cut the front of aluminum case a long each side in the middle of the rounded sides ( not to deep into the case just enough to cut the metal ) about a 1/4
( this is with two 18650 in series as a guide from the end that does not have the display )
of way down on each side and pry on top of plastic circuit board case until you can see that the glue has released from the case on top and bottom of the batteries
( the end that has the display board )
to release the glue so batteries can come out you MUST take your time doing this step and not be in a hurry or you will have an accident if you are not careful the one nice thing about the way they put this circuit board it is in a plastic case this the only reason I try to get it apart
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