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Batteries & Chargers Discuss Li-P, Li-Ion, NiMh, Nicad battery technology and the chargers that juice 'em up!

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Old 02-08-2018, 10:47 PM   #1
dereckbc
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Default Thunder Power Has 1 Less Customer

I use to be a fan or Thunder Power LiPo batteries, but no more after my last two orders. Use to be their C Rating was close. I decided to upgrade batteries from 3S to 4S for my EF 540 Edge, so I ordered 4 of TP ProLiteX model TP2200-4SPX25 a 4S 2200 mah 25C battery.

Once received I run them through my usual 3 cycle charge discharge cycles at 1C, then I take them to Storage Voltage at room temp and measure Internal Resistance to determine the true C-Rate. All 4 of them fail significantly. The best battery measures at 14 milli-ohms and on a 2200 MAH pack calculates to 14C and the worse pack measure 19 milli-ohms or a 11C. Absolutely horrible.

Going to stick with Gens Ace and my favorite Glacier. Sorry TP but you are fired.
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Old 02-08-2018, 11:30 PM   #2
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Ouch. Did you contact them about it?

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Old 02-08-2018, 11:39 PM   #3
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TP still makes batteries??? lol

They have been second rate for years. Of all the brands I have bought they have consistently been the worst.

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Old 02-09-2018, 11:59 PM   #4
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1/2 the quality. Twice the price.TP

I don't have a short temper. I just have a quick reaction to B.S.
Rob
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Old 02-11-2018, 03:46 PM   #5
Turbojoe
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A few years back when Thunder Power started these stupid sales where you had to wait weeks to have the packs you ordered "built" for you a bunch of us on RC Groups (once we FINALLY got our packs) did tests using the Wayne Giles ESR meter. Of all the TP packs I bought up to 70C not a single pack tested higher than 23C!! And that was after cycling and testing under the same conditions each and every pack. I still have 2 3S 2200mah TP packs NIP that have never been pulled out of the bags. To date I don't think I've used a single pack I bought during that sale. Couldn't be more disgusted with myself for wasting the money with a company I used to trust.

TP used to be the best of the best 15 years ago. Now it seems all they are doing is ordering reject packs from China and slapping their label on them. The ONLY packs in my possession that test close to their rated "C" so far have been Glacier and Gens Ace. In fact Glaciers sometimes exceeded their rating by 1 or 2 "C" on rare occasion.

I'm with dereckbc. Thunder Power will never sell me another battery.

Joe

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Old 02-11-2018, 08:21 PM   #6
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Haha. Intrigued by the Giles ESR meter, i just wen to ProgressiveRC to check one out. Clicked into the clearance section and all paraboards wired for Thunder Puffer, I mean Power, are around 1/2 off.

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Old 02-11-2018, 11:03 PM   #7
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Originally Posted by Turbojoe View Post
The ONLY packs in my possession that test close to their rated "C" so far have been Glacier and Gens Ace. In fact Glaciers sometimes exceeded their rating by 1 or 2 "C" on rare occasion.
+1. Gens Ace is decent and Glacier in my experience is excellent but seen short lived and puff up a bit early.

To my surprise I bought some Turnigy Nano 3S 2200 mah 35C packs about 1-1/2 years ago and they met my expectations. When I first bout them the highest Ri cell was around 3 milli-ohms, and no no higher than 5 which is still very strong. Cannot beat it for the price.
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