Re: [Elecraft] [KX1] A LiFePO4 internal battery option

2011-03-28 Thread Chip Stratton
I've been using the Powergenix NiZn cells too, and they do give a usefully higher pack voltage than even the Energizer Lithium AA cells. They are not as easy to manage as Nimh cells, however. You have to use the supplied charger with them, which seems not to initiate recharging unless the cell is

Re: [Elecraft] [KX1] A LiFePO4 internal battery option

2011-03-28 Thread Ignacy
have lower energy density than regular Li-Ion rechargeables but due to lower voltage one can use 4 of them for about 14 V max as opposed to 3 of the regular ones with 12V max. For K1 the 3 Li-Ion would be a better fit as 10-12V is sufficient and weight is half of LiFePO3. The last one are better

[Elecraft] [KX1] A LiFePO4 internal battery option

2011-03-27 Thread Chip Stratton
I found some LiFePO3 batteries that fit well within the KX1 case, and thought I would share: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=14075 These are a different Lithium chemistry (same as A123 cells) than the more common LiPoly cells. Their fully charged voltage is 3.6

Re: [Elecraft] [KX1] A LiFePO4 internal battery option

2011-03-27 Thread Fred Jensen
On 3/27/2011 7:02 PM, Chip Stratton wrote: I found some LiFePO3 batteries that fit well within the KX1 case, and thought I would share: I wouldn't put any high energy density battery inside any of my radios. The probability of a problem is very small. The impact if the probability becomes

Re: [Elecraft] [KX1] A LiFePO4 internal battery option

2011-03-27 Thread Chip Stratton
Fred's concern's noted. Consider however how infrequently laptops and cell phones catch fire and explode compared to the numbers in use - and almost all now use LiPoly or the less common (but safer) LiFePO4 technology. With any rechargeable Lithium technology proper charging techniques and

Re: [Elecraft] [KX1] A LiFePO4 internal battery option

2011-03-27 Thread Rick Commo
-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Chip Stratton Sent: Sunday, March 27, 2011 8:04 PM To: Elecraft Reflector Subject: Re: [Elecraft] [KX1] A LiFePO4 internal battery option Fred's concern's noted. Consider however how infrequently laptops and cell phones

Re: [Elecraft] [KX1] A LiFePO4 internal battery option

2011-03-27 Thread Leigh L. Klotz Jr WA5ZNU
Those are 6.6v, so I guess you use a pair? I've been using LiFePO4 in a lot of things, but haven't seen these that fit in the KX1. At 700mAH they're a bit small, but the constant operating voltage is nice. You might take a look at these, which are available at Fry's and Amazon: