First time charging of Celestron Power Tank
Posted 03 December 2010 - 10:21 AM
I recently purchased the Celestron 17H powertank for celestron Goto mount powering. I was about to charge it for 20hrs before use as per the instructins. On inserting charging plug and CHA on, the indicator lights showed green Fully Charged. Do I still need to charge it for another twenty hours especially there is a cautionary warning against overcharging it?
Posted 03 December 2010 - 10:39 AM
I have had gotten great service out of my powertank by not using the included charger. When I got mine last year I tried the included charger once, afterwhich I got rid of it because of the same uncertainty that you are going through. I immediately got a battery defender type charger from Amazon. Since then I have had ZERO charging problems.
You have to take great care when using/charging these powertank batteries. You can't overcharge or deplete the battery too much, otherwise it will shorten battery life. The battery defender type charger will keep the batteries operating at peak performace.
Posted 03 December 2010 - 10:48 AM
Posted 03 December 2010 - 10:55 AM
So far its the longest running battery i have for my setup and it has performed better than the other ones i have.
Edit: after reading the reviews on that, im not sure what those reviewers had a problem with but mine's been working stable for at least 9 months now. The schumacher one gets better reviews but this type of charger is generally what you're going for for making your astro batteries last.
Posted 03 December 2010 - 11:03 AM
Posted 03 December 2010 - 11:14 AM
Here is a trick I learned by accident... when the CTek disconnects from the battery during charging, it starts blinking for a few minutes until you reconnect it. What you can do is connect it to a good battery, and then disconnect it, and while it is still blinking connect it to a bad or dead battery. Often as not it will start charging the dead battery... Great charger!
Posted 03 December 2010 - 01:18 PM
Thanks for the prompt responses. I like EdtheEdge idea of teh defender charger. EdTheEdge,can you provide a link to the battery charger you talked about?
They don't offer the exact one that I got. But pretty much any smart charger will work. If you sear for Battery Defender on Amazon something will come up. HTH.
Posted 03 December 2010 - 01:30 PM
Posted 03 December 2010 - 04:10 PM
A very reliable source recommends the Battery Tender, 1.25 amp for charging. He advises that charging with higher than 1.5 amps shortens battery life.
Posted 03 December 2010 - 05:41 PM
(my Atlas mount will suck the Juice out of it in about 90minutes)
Posted 03 December 2010 - 08:43 PM
when i first got mine i thought they were defective, because i went by what the lights said and i wasn't getting much power out of them. now i tase the bejeezus out of them and they work fine.
Posted 05 December 2010 - 10:23 PM
If you MUST use the WallWart, NEVER charge it more than 24 hours, always charge it just after use, and NEVER - BUT NEVER fully discharge the unit by even accidentally leaving the switch on.
Posted 05 December 2010 - 11:50 PM
Posted 06 December 2010 - 06:18 AM
Posted 06 December 2010 - 11:45 AM
Posted 06 December 2010 - 03:20 PM
My 7ah pack doesn't work that way. The red light comes on first when it is down, and after a few hours or more of charging, the green light starts coming on, and then goes full green when charged.
i found i can't trust the lights on the powertank. when you plug it in it may say "charging" (green) and "fully charged" (red), but keep charging it until the green light goes out.
Posted 06 December 2010 - 10:03 PM
Posted 07 December 2010 - 03:05 AM
John, your's may be one of the few in which the charging circuit is properly calibrated.
I have never seen a Power Tank or been able to take one apart. Is there a way to calibrate the charging circuit? Just curious.
Posted 07 December 2010 - 03:17 AM
Beats me, I just use it, never been in one, but I would imagine there is a way.
I have never seen a Power Tank or been able to take one apart. Is there a way to calibrate the charging circuit? Just curious.Eddy B
Posted 08 December 2010 - 07:49 PM
Posted 08 December 2010 - 08:17 PM
My Celestron 17A PowerTank lasted several nights then it simply died. I returned the unit expecting to get another one - instead they automatically returned my money. Actually, I am glad I can buy something else.
It should be fully recharged ASAP after each night's use. I never venture out without it fully charged. See my earlier post. Three and a half years and not a hiccup.
Posted 09 December 2010 - 08:54 AM
Posted 09 December 2010 - 05:28 PM