On Dec 14, 11:41*am, "Percival P. Cassidy"
wrote:
On 12/14/10 11:13 am, wrote:





On Dec 14, 10:29 am, "Percival P.
wrote:
I have several 18v Ryobi tools and battery packs, including one of the
lower-capacity Li-Ion ones that shows as fully charged in the charger
but will not operate a tool and shows no voltage across the "supply
terminals" (there are separate charging contacts). It seems likely that
there is an internal broken connection between the battery and the
"supply terminals" that should be easy to fix if I can get the case apart.

But that is the problem: I have removed 4 Security-Torx screws in the
bottom and one in the "plug" part that goes up into the handle of the
tool, but the case still will not come apart. I can pry the halves apart
a small amount at either end, but they seem to be held firmly together
in the middle. There do not seem to be any screws hidden by the label on
the bottom

Has anyone managed to take one of these things apart? If so, how?
i get primecell.com to rebuild them, they work great after rebuild,
cost little more than buying the cells alone, one had paint smerared
on the battery case, it came back looking brand new, they must of
cleaned and buffed it too.

its very likely you have a bad cell or many bad cells in those packs..

But why does it show fully charged? The charger does have an
indicator-light pattern for "battery defective", which I assume (I know,
I know) would be triggered by the presence of a dead cell. As I wrote
originally, there are separate charging terminals, and the charge state
must be getting measured there.

Perce- Hide quoted text -

- Show quoted text -

Can't help you with how that specific battery comes apart. But I
reached the
same conclusion that you did. It's not worth sending them out to
rebuild. Between
the cost, the shipping, etc, you can usually buy a new battery pack on
Ebay for
maybe $10 more.

If you can DIY, then it's an option. I recently rebuilt an old
Milwaukee. Cost
me about $22 on Ebay for the new NiCads.