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HShack(at)aol.com Guest
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Posted: Tue Jun 03, 2008 6:10 pm Post subject: Firestar Project aka Radio |
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Just want to pass on some info.
I just bought an Icom A-6 with nickel metal hydride battery. Instructions say to not charge but 8 hours- 12 max. If you go over that you will ruin the battery. You must not leave even the on-board power connected for more than that. Also, you should not let the battery discharge all the way and stay there for a long time.
This would also apply to the A-5 or any other radio with Nimh battery [probably Nicad too].
Howard Shackleford
FS II
SC
In a message dated 6/3/2008 11:17:47 A.M. Eastern Daylight Time, slyck(at)frontiernet.net writes:
Quote: | HAVE to buy an intermediate device to lower the voltage. The built
in battery pack is crap.
-doesn't hold a charge for very long.
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Get trade secrets for amazing burgers. Watch "Cooking with Tyler Florence" on AOL Food.
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slyck(at)frontiernet.net Guest
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Posted: Wed Jun 04, 2008 4:13 am Post subject: Firestar Project aka Radio |
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The Nimh is a superior battery. Mine is likely the Nicad. The only one of those that I've had luck with ismy (old) heavy duty Milwaukee battery drill.
The battery in this Icom is also absurdly heavy.
BB
MkIII Mongrel
On 3, Jun 2008, at 10:07 PM, HShack(at)aol.com (HShack(at)aol.com) wrote:
[quote] Just want to pass on some info.
I just bought an Icom A-6 with nickel metal hydride battery. Instructions say to not charge but 8 hours- 12 max. If you go over that you will ruin the battery. You must not leave even the on-board power connected for more than that. Also, you should not let the battery discharge all the way and stay there for a long time.
This would also apply to the A-5 or any other radio with Nimh battery [probably Nicad too].
Howard Shackleford
FS II
SC
In a message dated 6/3/2008 11:17:47 A.M. Eastern Daylight Time, slyck(at)frontiernet.net (slyck(at)frontiernet.net) writes:
Quote: | HAVE to buy an intermediate device to lower the voltage. The built
in battery pack is crap.
-doesn't hold a charge for very long.
|
Get trade secrets for amazing burgers. Watch "Cooking with Tyler Florence" on AOL Food.
Quote: |
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Dana
Joined: 13 Dec 2007 Posts: 1047 Location: Connecticut, USA
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Posted: Wed Jun 04, 2008 4:18 am Post subject: Firestar Project aka Radio |
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At 10:07 PM 6/3/2008, HShack(at)aol.com wrote:
Quote: | Just want to pass on some info.
I just bought an Icom A-6 with nickel metal hydride battery. Instructions say to not charge but 8 hours- 12 max. If you go over that you will ruin the battery. You must not leave even the on-board power connected for more than that. Also, you should not let the battery discharge all the way and stay there for a long time.
This would also apply to the A-5 or any other radio with Nimh battery [probably Nicad too]. |
Same with the A-24. Just poor design... it's a trivial matter to build a charger that charges at a low enough rate (C/10 or less) that the battery won't be hurt by leaving it on indefinitely, though that means a long (overnight) charge time, or if a faster charge is required, senses the voltage and reverts to a trickle when the battery is fully charged. I don't know what Icom was thinking.
-Dana
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slyck(at)frontiernet.net Guest
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Posted: Wed Jun 04, 2008 3:32 pm Post subject: Firestar Project aka Radio |
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an alternative approach for those who want to use an attached battery pack is to buy theAA holder, I think I saw it for $38 somewhere today, and put AA NiMH in it.
The best ones I've found so far are Duracell 2650mAh that are the ONLY ones that
will hold up in a battery hog cam I have. Available at Kmart. -careful, a lot of them look
alike, look for the numbers.
I charge them in a slow charging Radio Shack charger.
BB
On 4, Jun 2008, at 8:14 AM, Dana Hague wrote:
[quote] At 10:07 PM 6/3/2008, HShack(at)aol.com (HShack(at)aol.com) wrote:
Quote: | Just want to pass on some info.
I just bought an Icom A-6 with nickel metal hydride battery. Instructions say to not charge but 8 hours- 12 max. If you go over that you will ruin the battery. You must not leave even the on-board power connected for more than that. Also, you should not let the battery discharge all the way and stay there for a long time.
This would also apply to the A-5 or any other radio with Nimh battery [probably Nicad too]. |
Same with the A-24. Just poor design... it's a trivial matter to build a charger that charges at a low enough rate (C/10 or less) that the battery won't be hurt by leaving it on indefinitely, though that means a long (overnight) charge time, or if a faster charge is required, senses the voltage and reverts to a trickle when the battery is fully charged. I don't know what Icom was thinking.
-Dana
--
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href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
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by0ung(at)brigham.net Guest
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Posted: Thu Jun 05, 2008 5:57 am Post subject: Firestar Project aka Radio |
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an alternative approach for those who want to use an attached battery pack is to buy the
AA holder, I think I saw it for $38 somewhere today, and put AA NiMH in it.
The best ones I've found so far are Duracell 2650mAh that are the ONLY ones that
will hold up in a battery hog cam I have. Available at Kmart. -careful, a lot of them look
alike, look for the numbers.
I charge them in a slow charging Radio Shack charger.
BB
Quote: | >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>.
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OOOOOOK if a person was to take a battery holder and fill it up with the rechargeable batteries of choice, feed it with the power from the airplane through a choke and a resistor so that during flight it is charging at a rate of 5 to 7 % of the rated amp hour rating of the battery, you could take off power at any voltage level to power different items in the aircraft. The trick here is to match the resistor, and the internal resistance of the cells to get the charge rate equal to the current drain of the running electronics plus the 5 to 7 %... this way you will never have to charge the batteries outside the aircraft,,,,, when the radio is in transmit mode it can use all the power required from the battery pack, while in the receive mode it will be charging at a trickle rate. With this approach,,,, as long as you turn off everything after flying,,,, you will always have fully charged batteries that wont over charge… and you only need enough cells to match the voltage setting of the radio. Make sure you install a fuse,, and master switch for safety.
Boyd.
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