LiFePO4 Battery Pack Performance

[W7JJL]

I recently purchased a 4 cell LiFePO4  12.8v 4.5ah battery.  I fully charged
the battery to 14.4v and then hooked it up to my KX3.  Total hours of run
time = 21.4 hrs.  Settings = backlight off, high power and all the other
settings in normal positions.  I transmitted in ssb for what would be a
normal transmit / receive cycle.  I received in ssb and psk 31.

 

John Lally

W7JJL

 

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[Pierre]

A question: I have an automatic sealed battery charger for my 12V Pb-Ac battery.
From:
http://www.ctcbattery.com/LiFePO4-Rechargeable-Battery/CTC-12-8V-4-5Ah-57-6Wh-Lithium-Iron-Phosphate-LiFePO4-Rechargeable-Battery

I read "Require no change to a lead acid battery charging system"

Does it means that my old charger will also work with those batteries?

73 de Pierre KX3 S/N 190

[Ignacy]

This batter seems to have a PCB that prevents overcharging so you may be good with any charger.

 A good lead acid battery charger should have a cutoff at about 14.5 V, which is good for 12.8V LiFePO4 battery. I found that some chargers actually produce up to 18V but perhaps at a very low current. So it would help to check.

Ignacy  

[Fred Townsend]

Generally the answer to your question is yes. However I am reminded of the
old cartoon where the patient is asking the doctor who is treating his
broken arm. 'Doctor when my arm mends will I be able to play the violin?'
'Of course,' the doctor answered.
The patient replied, 'Good! I never could play the violin before.'
73
Fred, AE6QL

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Pierre
Sent: Friday, August 03, 2012 6:31 AM
To: [hidden email]
Subject: Re: [Elecraft] LiFePO4 Battery Pack Performance

A question: I have an automatic sealed battery charger for my 12V Pb-Ac
battery.
From:
http://www.ctcbattery.com/LiFePO4-Rechargeable-Battery/CTC-12-8V-4-5Ah-57-6W
h-Lithium-Iron-Phosphate-LiFePO4-Rechargeable-Battery

I read "Require no change to a lead acid battery charging system"

Does it means that my old charger will also work with those batteries?

73 de Pierre KX3 S/N 190



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