I need expert advice

[keyplus90]

I recently bought JCB 24V SDS drill.

One like this,

http://www.cheapcordlessdrills.co.uk/cordless- drill.asp?m=JCB&p=24V+Cordless+SDS+Hammer+Dril l+D24CSDS&v=Tesco+Direct&s=24+volt+Cordless+Ha mmer+Drills

It was used or refurbished. I noticed that when battery is freshly charged then it is very powerful. But later on it just dies down, although its inbuilt battery level shows 80%.

Is there something wrong with the drill or battery. Or perhaps charger.

Thanks for all answers.

[nonomaybe]

My experience with battery driven tools is that those that take a lot of power, such as your machine and circular saws in particular, to operate,run out of puff very quickly.Were you able to switch your battery to a screwdriver, or smaller drill you will find that it would work well. Anyone with other views?

[Clanad]

It really does sound like an experience I've had here in the U.S. with a similar device. I had an "off brand" 18V cordless drill/driver such as the one depicted and it came with two batteries and the charger. After a few months the drill would work very well for a predictable amount of time, say, an average of 10 days with normal useage. The drill would lose power and it was time to change the battery. The other battery would only last 2 or 3 days under the same conditions. Ours, here, have no battery condition indicator. However, when the battery is mounted in the charger, it has a light that changes from red to amber to green as it achieves charge. Both batteries would charge to that indicated level in about the same time but one just would not "hold" the charge. I wound up buying another and it works very well. Obvioulsy there was an internal problem in the one battery...
Best of luck!

[keyplus90]

Thanks Nono - I tried even 5mm bit and did not work even with that.

Clanad- Even I think it is battery and I will try with the other one (got two) in the end may buy another new one. But only thing I was confused with, is the battery level and that shows enough life. So may be the indicator is confused as well.

Thanks.

[keyplus90]

Sorry misposted - I meant to say I tried with the other battery. May be both batteries are not holding the charge.

[shylock73]

Could it be the `carbon brushes` need renewing? Worth trying.

[keyplus90]

Shylock - Thanks for that, but what are the carbon brushes, and what can I do about them?

Sorry I am just a DIYer and am not familiar with certain things.

[Clanad]

Here's a link to what carbon brushes look like... they fit ina holder inside of the drill and the black part rides on the armature of the drill... the copper wiring attaches to diodes wihtin the drill. They may be bad, but I've have a couple of name brand cordless drills that are well over ten years old and the brushes are still good...
Even if they were bad, I don't think it would show up as a battery going flat too soon...

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewIte m&item=150189082717

[keyplus90]

OK these things. Thanks Clanad, I actually received a couple of these with the drill. But I did not know what those were for. I will have a look but I was thinking the same what you said, if these things are worn out then that should not affect the drill the way it is doing. But I will open and have a look any way. Thanks.