Ni-CD battery rebuild and upgrade Part2.wmv
Posted on April 2nd, 2010 by admin
Rebuild, Refurbish and Upgrade the Ni-Cd battery packs in your power tools , cordless phones, remote control toys … any power pack with two or more cells. Upgrade the mA (mA = milliamp) of your original by as much as 40%. What does that mean? Or, what does that do for me? mA is the ‘quantity’ of power available (amperage) to do work. mA translates to hours of use (mAh or Milliamp hours) by dividing the mA by 1000. Therefore; 1500 mA is equal to 1.5 hours of use. 1500 mA is typical for most older Ni-Cd power packs. The charger should accept and charge up to 2100 mA (that equals 2.1 mAh or 2.1 hours). But that . Trying to force it to charge cells higher than 40% of the original mA would exceed the limit of its perimeters and will result in you spending more for cells that will never fully charge. Here’s the math: 1500mA x 40% = 600mA 1500mA + 600 = 2100mA Most new / replacement cells will recharge 300 to 500 times if properly charged, discharged and stored when not in use.
Duration : 0:9:51
[youtube sYsxLDXfGSI]
April 2nd, 2010 at 9:33 pm
Its been my …
Its been my experience that anything can be rebuilt the only variable would be if buying a replacement is cheaper, less hassle, etc. Google lists the 19.2 as either Ni-Cd or lithium-ion model. The case looks like it has screws, so disassembly seems to be very possible. The terminals may be tricky just figure out if you need to needle-nose them in first, or it maybe required to push in a pick on one side first to release their lock. Good luck!
April 2nd, 2010 at 9:33 pm
Is it true that …
Is it true that Craftsman 19.2v branded rechargabel battery packs are not rebuildable?
April 2nd, 2010 at 9:33 pm
I sent you a pm. …
I sent you a pm. Nice idea – to convert to Li-ion. But more trouble than it’s worth. You’ll see why in the message.- Thanks for the comments!
April 2nd, 2010 at 9:33 pm
correction …
correction everywhere it says mAh i meant Ah.
April 2nd, 2010 at 9:33 pm
Hi, Very helpful …
Hi, Very helpful video. I am looking to rebuild my 18v Black and Decker packs with Lithium-ion batteries (cr123a) that have a much higher capacity than the stock Ni-Cad cells (6.0mAh @ 18.0v compared to 1.5mAh @ 18.0v, total!) and I was wondering, how would I charge the upgraded packs adequately? I have come up with three possible solutions but I’m not sure which is the best:
April 2nd, 2010 at 9:33 pm
(cont.d) 1st option …
(cont.d) 1st option; will my OEM black and decker multi volt charger (9.6v-18.0v) be smart enough (unlikely) to know when they are full (which is designed for Ni-Cad, not lithium), or will it stop before they get fully charged? Second option (cheapest and most appealing): Cut the end off of a regular AC adapter and splice it to mini alligator clips to connect. The charger will have a known output and a timer will be added. The problem with this is how will I know how much of the power
April 2nd, 2010 at 9:33 pm
(cont.d) I have …
(cont.d) I have drained from the battery and therefore, more importantly, how much to put back in (setting the timer) to
avoid overcharging? How easy is it to damage Li-ion batteries by overcharging? The third option is a Porter Cable LI-ion
charger that shares the same pack housing as a black and decker (also multi-volt). This is without a doubt a “smart”
charger but designed for 2.6 mAh 18v Li-ion packs which is a whole 4.4 mAh short of my upgraded packs. Will it compensate?
April 2nd, 2010 at 9:33 pm
(cont’d) How does …
(cont’d) How does it know when they are full, from a voltage reading? (i dont think it can read mah/capacity, right??)? As
you can tell I know very little about this stuff so any help you can provide would be greatly appreciated. Thanks, Dan
April 2nd, 2010 at 9:33 pm
Thanks for the …
Thanks for the comment. I’m sure you’ll do fine, my brother – A mechanic (us) have the advantage of that innate talent for analytical thought; and the ability to transfer it to our hands. In other words- if we can think it, we can fix it. Sent you a pm with some more tips – hope you find them useful. And by all means feel free to ask me whatever you are unsure of. Btw – the replacements for yours are $149-new, $100-refurbished. Even if you buy them at $26–$31 you stand to save big!
April 2nd, 2010 at 9:33 pm
Thanks for taking …
Thanks for taking the time to share your knowledge, I am also a mechanic trying to repair my snap on impact wrench battery CTB 3185. It is rated at 2.4ah so I guess I can use 3100mah batteries. Any advice would be really appreciated as its my first battery rebuild.