1st Completely Homemade Mod

[j0ker]

Here's an update......Not sure what has happen but the battery is no longer holding a charge. Circuit seems to be fine and the battery acts as though it takes a charge but I hit the button 1 time and voltage drops way down. Never even able to fire up the atty. I'm hoping it's just a defective batt but it's not simple to change so I haven't done it yet. Design flaw found...note to self....self, make battery easily replaceable..ok that's done.

 

[basic_atheist]

That's a cool idea. Now... if only you could still make calls on it and puff away at the same time... LOL. With a "go, go, gadget cellular e-cig" ringtone... LMAO... Seriously, this is dope. Thanks for sharing.

 

[gmojo]

Battery draining down just after a charge? Is it doing this only after hitting the button?

Sounds like my attempt with a Digi charging a cell phone, only mine never held a charge. I never found any shorts on my card, but I'm pretty sure that's what I did.

I have not had a chance to go back and play around and try to ge them to work lately, finally tried out a 510 so I'm converting my first decent mod over to that plus some circuits and better switches.

 

[j0ker]

The battery does take a charge but voltage drops pretty quick and more quickly when the switch is pressed. I'm hoping just a bad battery but I'm afraid it might be the circuit draining too. I really hope not. I might temporarily put the small battery back on the circuit to test it.....I haven't got a plan yet. Still considering my options and how I'm going to change the arrangement so the battery is more accessible.

 

[Dave Rickey]

I see an all-metal enclosure with a lot of rough edges. I think I know where my suspicions would start. What is that you're using for an insulator between the PCB and the casing?

BTW, my best guess for the charging circuit's problem would be the much higher capacity and lower resistance of the larger pack. You're charging a flat-pack nearly 5 times as large, it has to be running longer to charge than the original pack ever would, and it may be trying to push more current, as well. Not sure how to fix that, except maybe a fractional-ohm resistor in the charging line somewhere (getting the right value without knowing the natural impedance of both flatpacks would take trial and error).

--Dave

 

[j0ker]

The board is isolated from the metal box through hot glue which is non-conductive. I also put electrical tape on the bottom of the board. From what I read the only difference in my setup would be the length of time needed to charge the larger battery. If the larger battery were an issue I would imagine plugging it into a cell phone would be an issue. The digipower specifically states that you can charge the cell phone while the digipower is connected to the phone. That being said, the load of the battery in the phone battery is across the circuit at that time.