NI-MH Batteries, am I missing something?

Batteries, Chargers, and Battery Management Systems.
User avatar
neptronix   100 GW

100 GW
Posts: 14223
Joined: Jun 15 2010 5:56pm
Location: California refugee living in Utah, USA
Contact:

Re: NI-MH Batteries, am I missing something?

Post by neptronix » Feb 05 2012 4:12pm

Lol, you've not been scammed before by a battery seller or seen that happen to anyone else yet, have you?

Seller's answer will be: OK, ship it back to China for 2x the cost of it new, and we'll refund you, i swear..

Would you trust a company that intentionally ripped you off by selling you relabeled junk cells, to hold their end of the bargain and not scam you twice? :lol:
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500.
The new all-arounder: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: 20" eZee on a Cannondale Semi Recumbent.
Whipper-snapper: ? on a lightweight BikeE Semi Recumbent

cwah   10 GW

10 GW
Posts: 4214
Joined: Jul 24 2011 5:42am
Location: Between paris and london

Re: NI-MH Batteries, am I missing something?

Post by cwah » Feb 05 2012 6:55pm

I'll see what's his answer. I bought it for 2GBP, so quite cheap anyway. It's really a shame seller can lie so hard on batteries specs though
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

sangesf   10 kW

10 kW
Posts: 862
Joined: Nov 14 2008 8:13pm

Re: NI-MH Batteries, am I missing something?

Post by sangesf » Feb 06 2012 2:08pm

Well, I remember quite a few times of getting something in auction from eBay for like 1/10th the normal price and never ever receiving the item(s)... Go figure...

chilledoutuk   100 W

100 W
Posts: 180
Joined: Aug 28 2011 6:09pm
Location: Mersea Island, Essex, UK

Re: NI-MH Batteries, am I missing something?

Post by chilledoutuk » Feb 06 2012 2:27pm

i bought some sub c cells tested them and left negative feedback stating that there capacity was less than a third of what they claimed. I Still get messages from them asking me to remove my feedback and that they will refund me.

I tell them that if they send me a cell that measures within 10% of what they claimed then i would remove the negative feedback.

Annoys me tbh there could be a cheap chinese cell that actually measures to its stated capacity but you would never find it amongst the pile of crap they are selling on ebay.

User avatar
Allex   1 GW

1 GW
Posts: 3258
Joined: Dec 05 2011 8:46am
Location: Stockholm, Sweden

Re: NI-MH Batteries, am I missing something?

Post by Allex » Feb 06 2012 5:52pm

Sanyo Eneloop is the only way to go guys.
Great for high current applications and low discharge, also around 1500 cycles, not bad at all.

Image
Have those and they are great, getting all 2100mAh from em.

The also have newer version
http://www.candlepowerforums.com/vb/sho ... -announced

cwah   10 GW

10 GW
Posts: 4214
Joined: Jul 24 2011 5:42am
Location: Between paris and london

Re: NI-MH Batteries, am I missing something?

Post by cwah » Feb 06 2012 6:35pm

Allex wrote:Sanyo Eneloop is the only way to go guys.
Great for high current applications and low discharge, also around 1500 cycles, not bad at all.

Image
Have those and they are great, getting all 2100mAh from em.

The also have newer version
http://www.candlepowerforums.com/vb/sho ... -announced

2100mAH and 2500mAH a quite "standard" battery capacity. A lot of AA batteries can handle such capacity for 1000 cycles.

Uniross are batteries that have 2700 mAH true capacity:
Image
http://www.amazon.co.uk/Uniross-AA-2700 ... 158&sr=8-1

I'm looking for real high capacity AA batteries, something such as 3000+ mAH true capacity.

Just purchased the 2900mAH battery from VAPEXTECH:
Image
http://www.ebay.co.uk/itm/220458456232? ... 320wt_1396

Will tell you shortly if they live up to their specifications :)
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

User avatar
amberwolf   100 GW

100 GW
Posts: 30524
Joined: Aug 17 2009 6:43am
Location: Phoenix, AZ, USA, Earth, Sol, Local Bubble, Orion Arm, Milky Way, Local Group
Contact:

Re: NI-MH Batteries, am I missing something?

Post by amberwolf » Feb 07 2012 2:20am

cwah wrote:Just purchased the 2900mAH battery from VAPEXTECH:
Sounds like VaporWareTech to me. ;)

Toango   100 mW

100 mW
Posts: 46
Joined: Apr 28 2010 2:30am
Location: Anaheim, CA

Re: NI-MH Batteries, am I missing something?

Post by Toango » Feb 07 2012 4:03am

amberwolf wrote:
cwah wrote:Just purchased the 2900mAH battery from VAPEXTECH:
Sounds like VaporWareTech to me. ;)
My thoughts exactly :o
cool experimenting with unheard of brands but reading justins opinion here is insightful

http://endless-sphere.com/forums/viewto ... tery+video
My own personal feeling is that unless the cells are coming from a long standing big company with years and years of expertize and R&D and internal know-how in battery manufacturing, then they're not going to come close to the standards needed for a consumer industry
Cwah how do you plan to apply aa batteries to ebikes? Seems like a good idea but after i read other threads i have doubts on the practicality of it.

User avatar
Allex   1 GW

1 GW
Posts: 3258
Joined: Dec 05 2011 8:46am
Location: Stockholm, Sweden

Re: NI-MH Batteries, am I missing something?

Post by Allex » Feb 07 2012 7:18am

"2100mAH and 2500mAH a quite "standard" battery capacity. A lot of AA batteries can handle such capacity for 1000 cycles. "

Yeah sure, but do they have a low self discharge curve?
If Im using those in my remote I dont want them to self discharge after a 2 month.
Thats why they are perfect for things that I dont use very often.

cwah   10 GW

10 GW
Posts: 4214
Joined: Jul 24 2011 5:42am
Location: Between paris and london

Re: NI-MH Batteries, am I missing something?

Post by cwah » Feb 07 2012 2:04pm

Toango wrote:
amberwolf wrote:
cwah wrote:Just purchased the 2900mAH battery from VAPEXTECH:
Sounds like VaporWareTech to me. ;)
My thoughts exactly :o
cool experimenting with unheard of brands but reading justins opinion here is insightful

http://endless-sphere.com/forums/viewto ... tery+video
My own personal feeling is that unless the cells are coming from a long standing big company with years and years of expertize and R&D and internal know-how in battery manufacturing, then they're not going to come close to the standards needed for a consumer industry
Cwah how do you plan to apply aa batteries to ebikes? Seems like a good idea but after i read other threads i have doubts on the practicality of it.
I just received the batteries today, I'll tell you shortly what they worth :)

I don't plan to apply aa batteries to my bike lol. Just using them as general batteries (mouse, light...)
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

sangesf   10 kW

10 kW
Posts: 862
Joined: Nov 14 2008 8:13pm

Re: NI-MH Batteries, am I missing something?

Post by sangesf » Feb 14 2012 1:23am

You didn't go wrong...
They're full of crap with the mAh rating...
13480 type cell ain't gonna have 3.2Ah at 1.2v..
Lol

cwah   10 GW

10 GW
Posts: 4214
Joined: Jul 24 2011 5:42am
Location: Between paris and london

Re: NI-MH Batteries, am I missing something?

Post by cwah » Feb 15 2012 6:45pm

Just cycled and tested the VAPEXTECH 2900mAH:
Image
http://www.ebay.co.uk/itm/220458456232? ... 320wt_1396

The batteries top at around 2.30AH. Still 500 to 600mAH difference with the specs advertised. I can't believe it they are all lying on the batteries because most people don't check.

And the seller still has 99% customer satisfaction!!
Help me find my stolen electric brompton: http://bit.ly/1a0vbBC and Bosch Sinus B3 http://bit.ly/1eV0WQz

Post Reply