My charger dewalt DE9135 doesn't work - Dewalt 7.2-18.0 Volt One Hour Charger

Question edited for a lot more clarity. All questions need full 'make model (what it is)' please.
Question moved from Garden to make model category.

It is this one with wildly differing prices!

https://www.google.com/search?q=Dewalt+DC9096+charger

..

You don't.

Almost certainly yes, but ask the DeWalt Service Department. They will know.

Worksite Radio/Charger - DC011 ' DEWALT

www.dewalt.com > storage-and-gear > jobsite-radios

The DC011 Worksite Radio/Charger is a great addition to the tools professionals love. Listen to the radio, CDs, or digital music from your phone or MP3 player. DEWALT®'s cordless worksite radio has great reception, is weather resistant, and runs off of 7.2V to 18V DEWALT® batteries that take an hour to charge.

Worksite Radio/Charger - DC011 ' DEWALT

www.dewalt.ca > storage-and-gear > jobsite-radios > dc...

The DC011 Worksite Radio/Charger is a great addition to the tools professionals love. Listen to the radio, CDs, or digital music from your phone or MP3 player.

Dewalt DCB105 li-ion XR Battery Charger 10.8V - 20V


For Battery Type: Ni-Cd Ni-MH
Input Voltage: 110V-240V
Smart Charger for Dewalt 10.8V ~ 20V Li-ion Battery
For Brand: DEWALT
Color: Black
Brand New: A brand-new, unused, unopened, undamaged item in its original packaging


http://www.drillbattery.com.au/charger/dewalt-DCB105-charger.html

Some battery can not be charged by fast charger, because this can damage the battery. You can think to replace it to a new charger, a 7.2V 9.6V 12V 14.4V 18V NI-CD NI-MH BATTERY charger for Dewalt

Here is the manual for the charger - note on page 2 the meaning of the problem you describe - time to replace batteries (depends how old they are)
http://download.sears.com/own/00925737e.pdf

That being said, check the videos out, perhaps can get it to work after all for a while longer.

The charger for the dewalt 18V battery.
http://www.ezbuybatteries.com/dewalt-72v-18v-battery-charger-universal-replacement-13821.html

What I do know is that some NiCd 12V Black decker batteries that look similar to the dewalt ones they are charged by the dewalt charger.
But there are 12V Nicd black and decker batteries that they can not be charged due to an extra plastic edge that does not allow to be charged by the dewalt charger.
Now if you do have the dewalt lithium 36V charger and if the black and decker battery is a 36V lithium one and can not be charged due to a plastic edge then I would recommend to risk to destroy the plastic edge in order the black and decker battery to be charged.

You will need he correct charger, the 24V will destry a very expensive battery.

Inside my (older, non nano) dewalt charger there is indeed a fuse, which has never blown (yet).
I'd be suggesting that you contact dewalt before you void your warranty by opening it up though.