I just got my first XTS battery and, since I use a MAHA charger, I need to know the contact pinout on the back of the case. I'd have thought it was the two outside contacts like on the Sabers but it's not charging.
Also, I'm showing 0.0 volts on all the pins on the radio side. I'd have thought even run totally dry, it would show something. Could it be a bad battery?
Hep me!
XTS charging contact pinout
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jnglmassiv
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jnglmassiv
- Batboard $upporter
- Posts: 512
- Joined: Sun Feb 24, 2002 4:00 pm
Battery pinouts
Hi,
Well, since the same charger will charge a Saber and an XTS, I would assume the pinout is the same.
But, no, you won't measure any voltage on the outside contacts because they put in a diode to keep you from melting your pocket change...
You should be able to measure voltage on the inside, however.
73 DE Hartley
Well, since the same charger will charge a Saber and an XTS, I would assume the pinout is the same.
But, no, you won't measure any voltage on the outside contacts because they put in a diode to keep you from melting your pocket change...
You should be able to measure voltage on the inside, however.
73 DE Hartley
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jnglmassiv
- Batboard $upporter
- Posts: 512
- Joined: Sun Feb 24, 2002 4:00 pm
Yea, I wouldn't expect to make any meaningful measurements on the back of the battery. As it turns out, prior to the St. Patty's day shenanigans yesterday, I did some experimenting with charging configurations.
The MAHA MH-C777PLUS-II charger, if you're not familiar with it, is a universal tri-chem charger that has what they call 'floating contact pins'. These can be moved left and right and up and down to accomodate various battery packs. Additionally, there's alligator clips on the back to attach to pins or wires. I use the gator clips with a battery holder to charge loose AA's for my scanner, digital camera, etc. There's a polarity switch on the front of the unit that toggles the pin polarity. I've used it to charge NiMH and nicad Saber batts and the occasional cellular lith-ion battery.
Once a battery is on the charger, it beeps and displays the battery voltage. This voltage is always somewhere near the nominal battery voltage. With the XTS batteries, I'm not able to get anything close to the correct voltage. I tried every possible combination of pins and polarity. I got voltages from 20.1 to 1.1v. Then, on a whim of frustration, I tried through the front of the battery (the radio side). Lo and behold, the charger beeped, showed 7.8 volts and began charging. It charged up to 8.2 or so and was done. Needless to say, this is suprising. I'd have thought the radio side would have been diode protected but in the opposite polarity.
Anyway, my problem is solved albeit in an unexpected manner. The radio side pins are a little tricky to get at but I'll get some kind of jig together.
The MAHA MH-C777PLUS-II charger, if you're not familiar with it, is a universal tri-chem charger that has what they call 'floating contact pins'. These can be moved left and right and up and down to accomodate various battery packs. Additionally, there's alligator clips on the back to attach to pins or wires. I use the gator clips with a battery holder to charge loose AA's for my scanner, digital camera, etc. There's a polarity switch on the front of the unit that toggles the pin polarity. I've used it to charge NiMH and nicad Saber batts and the occasional cellular lith-ion battery.
Once a battery is on the charger, it beeps and displays the battery voltage. This voltage is always somewhere near the nominal battery voltage. With the XTS batteries, I'm not able to get anything close to the correct voltage. I tried every possible combination of pins and polarity. I got voltages from 20.1 to 1.1v. Then, on a whim of frustration, I tried through the front of the battery (the radio side). Lo and behold, the charger beeped, showed 7.8 volts and began charging. It charged up to 8.2 or so and was done. Needless to say, this is suprising. I'd have thought the radio side would have been diode protected but in the opposite polarity.
Anyway, my problem is solved albeit in an unexpected manner. The radio side pins are a little tricky to get at but I'll get some kind of jig together.