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Author Topic: Anyone tried this 21000 mAh battery for FT-857D?  (Read 2152 times)
WT1J
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Posts: 11




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« on: June 09, 2014, 01:18:03 PM »

Saw this on eBay today and wondering if anyone has tried this battery?

http://www.ebay.com/itm/21000mAh-Mobile-Power-for-Ham-Field-Radio-Station-FT-857-KX3FT-817-Phone-Iphone-/181383632629?_trksid=p2054897.l4275

Are there better alternatives? I'm looking for something that will power my Yaesu FT-857D at 100W SSB for a few hours on a SOTA expedition.

Thanks.
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K5UNX
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« Reply #1 on: June 09, 2014, 03:37:18 PM »

For the money they want, you can put together a AGM battery, solar panel, charge controller and have more Ahr's available. I bought a 35Ahr battery at Batteries Plus for $75 and a Battery Tender charger at Walmart for $25.  That still leaves over $300 left over for solar, charge controller etc. 
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W8JX
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Posts: 6075




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« Reply #2 on: June 09, 2014, 05:28:02 PM »

Saw this on eBay today and wondering if anyone has tried this battery?

http://www.ebay.com/itm/21000mAh-Mobile-Power-for-Ham-Field-Radio-Station-FT-857-KX3FT-817-Phone-Iphone-/181383632629?_trksid=p2054897.l4275

Are there better alternatives? I'm looking for something that will power my Yaesu FT-857D at 100W SSB for a few hours on a SOTA expedition.

Thanks.

Weight wise nothing can touch it. Money aside two would weigh less than 10 lbs combined and give you several hours of hard use.

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K5UNX
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« Reply #3 on: June 09, 2014, 05:42:52 PM »

I missed the weight . . almost 2 KG? That's pretty light . . .
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WB8VLC
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Posts: 123




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« Reply #4 on: June 15, 2014, 05:18:02 PM »

You may be able to save over half the price if you made your own.

Check all-battery dot com and they sell pre-assembled packs, they may have something that will work better.
I use all-battery to re cell old ht packs and to power portable qrp radios.

http://www.all-battery.com/nimhnicdpacks24v-60v.aspx

http://www.all-battery.com/li-ionpopacks37v-37v.aspx
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KA5PIU
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Posts: 446




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« Reply #5 on: June 16, 2014, 04:36:56 AM »

Hello.

It looks to be a polymer battery.
https://en.wikipedia.org/wiki/Lithium_polymer_battery
Yes, they can burst into flames.
So, the question is, how good is the protection circuits?
Remember that 21000 mAh is a lot of battery!
Be careful.
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