I just gotta bunch of Gens Ace 1,000 mAh 1S lipos in .. weighing 28 grams. I was wondering what weight loss I might realize by doing some de-construction, and maybe building some 1S2P packs to save on weight. Much to my surprise and chagrin, there is underneath the cover and insulating tapes, a micro pcb with ic's and so forth populating it.

What would be the purpose of such a board on a 1S Lipo? I am guessing similar to what's found on the 18650 after-market Panasonics .. protection circuitry? I find no mention of any thing like that describing this battery, and of course, no balance leads needed.

My build yur own 2P fantasy is out the window .. these guys must be necessary, but what do they do? I've never opened a 1S before .. su-prazse su-prazse su-prazse .. he said to Sgt Bilko

Can you post a good picture of it?

It may just be a fuseable link to prevent overcharging.
Or something to prevent over-discharging.
Whatever it is, the cell will work without it.

Originally Posted by TheWoodCrafter

Can you post a good picture of it?

It may just be a fuseable link to prevent overcharging.
Or something to prevent over-discharging.
Whatever it is, the cell will work without it.

I'll try to get a pic tomorrow .. cam is up in the wood-shop. There are two 8 pin ic's, one 6 pin ic, 2 resistors and one capacitor .. pcb is marked DLX-3048D, measures 1.110" x 0.225". With the little 12x lens on Helping Hands, I can see the markings on the 8 pin chips, but without surety. Maybe have to dig out the mike to see what they are, but not tonight. Thanks for your interest their WoodCrafter.

Originally Posted by TayNinh68

I'll try to get a pic tomorrow .. cam is up in the wood-shop. There are two 8 pin ic's, one 6 pin ic, 2 resistors and one capacitor .. pcb is marked DLX-3048D, measures 1.110" x 0.225". With the little 12x lens on Helping Hands, I can see the markings on the 8 pin chips, but without surety. Maybe have to dig out the mike to see what they are, but not tonight. Thanks for your interest their WoodCrafter.

That's a lot of stuff. Most 1s charging ICs are not even 8-pin so rather interesting.

hmmmm, get us pics, im interested to see what it is

Originally Posted by grimbeaver

That's a lot of stuff. Most 1s charging ICs are not even 8-pin so rather interesting.

I did post on their forum.gensace.com last night http://forum.gensace.com/read.php?8,721 and the curiosity is universal is seems. One would think that the moderator for that forum would pick up on this, and simply dash off an explanation there.

Product link http://www.hobbypartz.com/98p-15c-1000-1s1p-wk.html

Seems to have a lot of positive reviews, but I guess I'm the first one to actually pull off the tape. In case you're wondering "Why" .. I tried to find the Tenergy 2,000 mAh @ 33 grams .. $12.20 a copy, but to no avail. 16.5 grams per AH is gotta be some kinda record if it's accurate .. at least until the new 4ah Pani comes out in April.

Thanks for your interest .. I'll try to dial in the camera thing later today.

"hmmmm, get us pics, im interested to see what it is "

I would suspect a balancing, or undervoltage protection circuit.

Les

Can't see it has anything to do with balancing.
This is a 1 cell pack, nothing to balance against.
It has to be there to protect the cell from either discharge or over charge.

Originally Posted by LesUyeda

"hmmmm, get us pics, im interested to see what it is "

I would suspect a balancing, or undervoltage protection circuit.

Les

It's just a 1S Les .. no balancing required, and it's Not two 500 mAh hidden inside, or there would be 3 tabs. I took some pics this morning (Nikon s8100) but comp does not see the cam on usb. Just technical crap on my end here. The port does charge the cam, but maybe the cam only does usb 2. I'll figure it out, but worst case, I'll dig out the ole disecting mike, and read the chips

Originally Posted by TheWoodCrafter

Can't see it has anything to do with balancing.
This is a 1 cell pack, nothing to balance against.
It has to be there to protect the cell from either discharge or over charge.

What ever it is, I got 16 of 'em here, and there is absolutely NADA about any protection anything in the specifications .. ad listing. The reviews are very good, but no one else has ever opened one up before apparently. Why would they .. lol

"This is a 1 cell pack, nothing to balance against."

Until they take another one off the assembly line, and use it with another, and another, and another, to make multiple cell packs.

Les

Originally Posted by LesUyeda

"This is a 1 cell pack, nothing to balance against."

Until they take another one off the assembly line, and use it with another, and another, and another, to make multiple cell packs.

Les

Well that's what I was thinkin' on doin' Les .. save some weight from packaging overhead. That Tenergy is a beauty .. 2,000 mAh weighing in at only 33 grams, but they want me to order 100 .. yeah .. right LOL

JST .. Japan Solderless Terminal, makes tons of different types, but nothing indicating a Standard per say, for small RC batteries. Question; So it has simply evolved by concensus that what we simply refer to as JST, is two 0.25mm square terminals on 2mm centers? I gotta spec some pin headers .. hate to bother Newark for the wrong stuff

http://www.newark.com/jsp/search/pro...sp?SKU=93K6376 JST plugs are 0.127" thick, so .. clip clip clip I guess

"so .. clip clip clip I guess"

You can count on it. I NEVER plan on using whatever they supply.

Les

Here is it .. the mystery 1S pcb

http://www.rcgroups.com/forums/showa...9&d=1350076557

The two 8 pin ic's are MDC0531E's made by Magnachip, 8 amp Common-Drain N-Channel Trench MOSFET's used for Lithium-Ion Battery Packs and Portable Battery Protection Modules. I'm just guessing they are in parallel, as the battery is rated at 15C .. 15 Amps .. just under 16.

For the few grams .. probably won't mess with them .. just use them as is. Interesting that there is no mention of any protection circuitry associated with this battery, and I'm sure HobbyPartz is oblivious as well. Probably have at least four of these in parallel supplying 15 amps .. just under 4C .. pretty mellow.

So what's the thought here, is it to protect the battery from over amping it or from low voltage?