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Grid Battery Rebuild

wait, am i somehow being stupid? because this battery pack can only fit 9 sub-c batteries. are there shorter cells (that grid used)?
 
i have several grid cartridge power supplies and one external. they are all little over 16V with various amp ratings over 4A (i think it depends on subcontractor, mostly pulver?)
but afaik grids are flexible about their power, according to classicbits, between 9 and 18v
the 5 1/4 inch floppy drive i have also takes 16v and is sensitive about it, it needs 16v to produce 12v for the drive motor. (i tried 12v psu and the 12v line was only 10.xV with it)
but if the battery pack nominal voltage is higher it means they used shorter cells? how to source them?
after more research there are indeed shorter subc batteries.
 
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I don't recall what cells I used when I built my own pack for my Gridcase--I sold that turkey years ago. LCD displays were barely usable back then.
 
Well. I recelled the battery with 12 4/5 subc cells. The initial voltage was 15V but it charges back to 14.5V only. It worked initially but doesnt boot after recharging. I wonder it it is able to give my GRiDCase 1520 enough current? I have CF card and gotek so it shouldnt require too much?
Anyways, I think my next attempt is going to be new 3d printed battery case and modern lithium cells with charge controller. So my dream of taking gridcase on an airplane will be postponed a bit ;-)
 
0xDEADBEEF said:
Anyways, I think my next attempt is going to be new 3d printed battery case and modern lithium cells with charge controller. So my dream of taking gridcase on an airplane will be postponed a bit ;-)
Click to expand...
Before you go to all the trouble of 3D printing, etc., why don't you just try hooking up an external Lithium battery source (~15V) and see what happens? For example, I can run my GridLite on an 11.4V (rated) Lithium pack I use for drones, etc (with an XT60 connector). In my case, I have a jumper with alligator clips I attach to the battery terminals on my Grid, but you can do whatever works (it's not going to be permanent).
It doesn't make sense that the pack works the first time, but not after a re-charge. I don't know the source of your cells (and I don't know how the GridCase current draw compares to the GridLite--especially without HD), but Lithium RC packs can source a lot of current depending on their C rating.
 
The cells are Tenergy 4/5 subc nimh from Amazon. They came directly from Tenergy and were initially precharged. I think GRiDCase does not charge them fully.
 
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