? Box mod with charger connection (Venting With Flame fears)

[TWalker]

I made a passthrough from a variable voltage AC universal charger connected to a AA box. Works like a champ at multiple voltages.

My question is: I can put a 14500 battery into one slot and it would charge the battery (Im assuming) But with no real charging mechanism is in place to prevent overcharge/discharge or control the voltage going into the battery could it be trouble?

Of course I have the ability to regulate the voltage at the charger with the voltage switch and the charging device itself is of reasonable quality and designed for charging purposes of expensive electronic devices so is it safe?

1. The charging device I assume has some protection built into it.
2. Will a 14500 protected battery prevent any unforseen problems with its built overcharge/discharge protection?

Do I need additional circuitry in the box to prevent any meltdowns or "venting with flame" situations.

Thank you in advance

 

[grantemsley]

I think (but have absolutely no proof, so don't take my word for it) that a proper Lion charger is needed. There is a mechanism in most battery chargers that watches for signs that the battery is done charging and stops when the battery is full. I think the protection part of the batteries is meant more as a last resort to prevent an explosion. Not something you should be counting on for repeated charging.

And of course if you accidentally put an unprotected battery in there, or the protection mechanism didn't work...your battery WILL explode.

My suggestion actually would be more along the lines of modifying a cheap Lion charger to connect via a normal jack. I've considered doing that for a couple of my mods - basically just open the charger up and solder wires to the battery terminals.

 

[TWalker]

Thats what I'm not sure of but since the passthrough power source is designed to charge those types of batteries I'm thinking it could work.

I tested my normal 14500 charger output and it was about 7V. The passthrough doesn't have a 7V option so Im just wondering if I could set it to 6.

There might be other factors I am not even thinking about...

 

[grantemsley]

I'm wondering if the passthroughs have some sort of charging circuit in them to make that work properly. I know they use a seperate protection board and an unprotected battery, so it could be built into that.

If you can't find the answer here, try searching on www.candlepowerforums.com's forum. They are flashlight enthusiasts and one thing we have in common with them is a desire for super high powered portable batteries.

 

[WillyB]

I tested my normal 14500 charger output and it was about 7V.

I've never seen any single cell Li-Ion charger that outputs 7V.

 

[TWalker]

I've never seen any single cell Li-Ion charger that outputs 7V.

Yea my bad. More like 4.2V musta pulled that outta my tired brain.

 

[capecodjim]

I made a passthrough from a variable voltage AC universal charger connected to a AA box. Works like a champ at multiple voltages.

My question is: I can put a 14500 battery into one slot and it would charge the battery (Im assuming) But with no real charging mechanism is in place to prevent overcharge/discharge or control the voltage going into the battery could it be trouble?

Of course I have the ability to regulate the voltage at the charger with the voltage switch and the charging device itself is of reasonable quality and designed for charging purposes of expensive electronic devices so is it safe?

1. The charging device I assume has some protection built into it.
2. Will a 14500 protected battery prevent any unforseen problems with its built overcharge/discharge protection?

Do I need additional circuitry in the box to prevent any meltdowns or "venting with flame" situations.

Thank you in advance

You can get a USB charger and put the board in your mod. It works great charging the 14500 in my mini-pump! (link in my sig)

 

[Sibirniki]

You can get a USB charger and put the board in your mod. It works great charging the 14500 in my mini-pump! (link in my sig)

I was about to say the same this small board in charges has all mechanisms that you need. Overcharge shotdown and etc.