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Old Mar 11, 2010, 03:30 PM
agnotology
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Intersting new LiFe 6.6V, 15g, battery

http://www3.towerhobbies.com/cgi-bin...?&I=LXYXA6&P=7

Now we need a 25g, 400mAh one...

Kevin
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Old Mar 11, 2010, 03:47 PM
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Quote:
Originally Posted by kcaldwel View Post
http://www3.towerhobbies.com/cgi-bin...?&I=LXYXA6&P=7

Now we need a 25g, 400mAh one...

Kevin
you could run two parallel at 30 grams to get 400 mah .

Do these cells charge on a standard li-po charger [triton]

boot
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Old Mar 11, 2010, 03:56 PM
agnotology
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"NOTES: These batteries require a charger that specifically
states that it is capable of charging LiFe cells"

Many of the newer chargers have a LiFe setting, but I don't believe the older Tritons do. The Triton EQ does.

Yeah, two in parallel would probably be less than 30g, because they could share the wires and packaging. That would be quite good, but a bit pricey. Maybe 3 cells in series to make 9V at 22g, and a switching reg to get maybe 400mAh at 5V?

Kevin
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Old Mar 11, 2010, 03:56 PM
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No, they charge on A123 style chargers similarly to lipo but with less voltage.
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Old Mar 11, 2010, 04:13 PM
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Nice find, Kevin.

There is not much info, though.

What is the discharging rate?
1C (0.2A) seems too low. Maybe is a typo, its bigger brothers are 10C.

What is the charging rate?
2C (0.4A), according to the 1100mAh specification.

I may order 2 packs just for testing.

Tai
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Old Mar 13, 2010, 01:08 AM
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They're expensive, but probably an awesome choice, especially if you don't use digital servos - I usually fly 2-3 hours on 150mAh with 4xD47s.

Best,
Mihai
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Old Mar 13, 2010, 02:43 AM
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Usually, Tower Hobbies has a 20% coupon, $10 out of $50, (sometimes 40%, $10 out of $25, but I haven't received it for a while.) The shipping is $4.99. (Don't know how much it is to Canada, Kevin ) 3 packs come out $55 shipped or $18 per 200 mAh. It is more expensive than K2 ($14 per 400mAh.)
The advantages of Hobbico Life over K2 rcr123 are the possibility of lighter pack (15g < 33g) and the faster charging rate (2C >>> C/5).

Tai
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Old Mar 13, 2010, 09:28 AM
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Quote:
Originally Posted by kcaldwel View Post
http://www3.towerhobbies.com/cgi-bin...?&I=LXYXA6&P=7
Now we need a 25g, 400mAh one...
Kevin
How about two 3V. cells in series with total weigh 24g. and have 850mA capacity?
http://www.kodak.com/eknec/documents...9d7f8/KCR2.pdf

Or better yet two 3V. that weigh 32g. and have 1550mA capacity.
http://www.kodak.com/eknec/documents...7ec/K123LA.pdf

It's amazing that so few of us enjoy using these incredibly long life cells.
John255
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Old Mar 15, 2010, 11:44 PM
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Whups!!!!
Didn't mean to shut your thread down.
Just responding to you wish.
Regards,
John255
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Old Mar 15, 2010, 11:59 PM
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John, those are single use cells - the one above is rechargeable.
M.
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Old Mar 16, 2010, 12:01 AM
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Originally Posted by Mihai View Post
John, those are single use cells - the one above is rechargeable.
M.
So!
It is entirely possible to live a charge free life!
For hand launch gliders, that is.
John255
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Old Mar 16, 2010, 12:11 AM
agnotology
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And still charge your Tx.

John, we've been through this before. A lot of us like rechargeables, and dislike throw-aways. Let's leave it at that.

Kevin
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Old Mar 16, 2010, 12:12 AM
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I'd never be sure when to change the battery - I always recharge at the beginning of the day and feel relaxed for at least an hour... besides, I'm a cheapskate - I like to call it "optimizing for cost" .

M.
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Old Mar 16, 2010, 01:37 AM
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I back ordered this small Life. Tower ETA is mid March. I've just called another supplier, which is more reliable in ETA, and the answer was end of April, just in time for IHLGF...

Tai
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Old Mar 16, 2010, 12:00 PM
G_T
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Mihai,

Do like many of us and leave one plane on charge with a gel cell or LiPO pack feeding a small charger like the Sirius, while flying another plane. Just swap off every once in a while, or for during a contest, when not flying leave it on the charger.

Gerald
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