Model Boat Mayhem - Forum

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: Are these fair dinkum AA  (Read 481 times)

RAAArtyGunner

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,547
  • Location: Brisbane, Australia
Are these fair dinkum AA
« on: February 24, 2017, 09:30:17 AM »

Are these AA batteries fair dinkum?
Am under the impression that NiCad and NiMh are the only rechargeable ones available???
These were obtained from that global warehouse, AKA China.
They are marked as being a rechargeable alkaline battery of 1.5V the capacity 3000Ma, is not indicated thereon.
Only one capacity (3,000) is available.
The attraction is if these are genuine, that is rechargeable; they then have application in transmitters and receivers due to the 1.5V rating, four batteries per receiver delivering 6V.
With regards to charging, have an Imax B6 universal charger, would it be suitable for recharging on NiMh setting???

Logged
Gunna build those other boats one day.

furball

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 194
  • Location: Herne Bay, Kent
Re: Are these fair dinkum AA
« Reply #1 on: February 24, 2017, 11:20:21 AM »

You can certainly get rechargeable alkaline batteries:


https://en.m.wikipedia.org/wiki/Rechargeable_alkaline_battery




Lance
Logged

roycv

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,437
  • Location: S.W. Herts
Re: Are these fair dinkum AA
« Reply #2 on: February 24, 2017, 12:13:29 PM »

Hi having been conned twice by batteries from china I would be surprised that they were 3000maH capacity!
How much did they cost?
regards Roy
Logged

grendel

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,166
  • Location: Canterbury, Kent, UK
Re: Are these fair dinkum AA
« Reply #3 on: February 24, 2017, 12:50:17 PM »

I now use nickel zinc rechargeable batteries 1.65v in cameras etc, they last a lot longer than the 1.2v things and run at the same voltage as standard alkaline batteries. the only downside is you do need a separate charger for them.
http://www.maplin.co.uk/p/nickel-zinc-aa-rechargeable-batteries-4-pack-n37ka
Logged

Martin [Admin]

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 15,716
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: Are these fair dinkum AA
« Reply #4 on: February 24, 2017, 04:16:02 PM »


If you need AA rechargeables, don't waste you money, only buy decent ones, i.e. Eneloop.


I do usually buy cheap first time round and see if I can get away with it but certain things, experience has taught us, buy the 'named brand' product and pocket the difference later!
Rechargeable batteries,
Digital cameras,
Car tires,
Frying pans,
Breakfast cereals,
Washing machine soap or conditioner,
Margarine or butter,
Coffee,
... toilet paper!


It doesn't have to be the best 'named brand' product available, but usually the low end stuff, still inherits some of the build quality / technology from the high end stuff.  Also, the bigger companies have a reputation to uphold so don't want too many come backs to tarnish 'the Brand'!  I tend to buy from reputable suppliers that have a proven track record of good customer service. ........ like Westbourne models!   Argos, Amazon, Paypal, etc.

Cheap stuff, like from eBay, almost every 'strange-name' product out of China, the 'one batch run' stuff out of Lidl, Aldi, B&M,PoundLand/world,  well 'you pays your money and you makes your choice!' .... if it even works  out of the box, result!!     :-))

 
Logged
"This is my firm opinion, but what do I know?!"    -   Mayhem FaceBook Group!

roycv

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 1,437
  • Location: S.W. Herts
Re: Are these fair dinkum AA
« Reply #5 on: February 24, 2017, 05:58:15 PM »

Hi all, I bought some AA cells from China knowing they were not 2500maH as marked because a web site had checked them out at 1000maH but they were just 35p each! 
I put them in a 40 Mhtz transmitter and put them on charge allowing for them to be only 1000maH.  The little s**s overheated and they distorted the plastic of the Tx so much it was a write it off!  My ones must have been even less.

One tip for a first check of a suspect high amp hour cell is to weigh it, if it is light in comparison to a known cell then someone is telling porkies!  The weighing advice came from a well known retailer of batteries.

I only buy authentic marked cells now they last a long while as well.
regards Roy
Logged

RAAArtyGunner

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,547
  • Location: Brisbane, Australia
Re: Are these fair dinkum AA
« Reply #6 on: February 24, 2017, 10:59:01 PM »

Hi having been conned twice by batteries from china I would be surprised that they were 3000maH capacity!
How much did they cost?
regards Roy

Couple of bucks a piece including delivery from China.
Logged
Gunna build those other boats one day.

RAAArtyGunner

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,547
  • Location: Brisbane, Australia
Re: Are these fair dinkum AA
« Reply #7 on: February 24, 2017, 11:01:30 PM »

Hi all, I bought some AA cells from China knowing they were not 2500maH as marked because a web site had checked them out at 1000maH but they were just 35p each! 
I put them in a 40 Mhtz transmitter and put them on charge allowing for them to be only 1000maH.  The little s**s overheated and they distorted the plastic of the Tx so much it was a write it off!  My ones must have been even less.

One tip for a first check of a suspect high amp hour cell is to weigh it, if it is light in comparison to a known cell then someone is telling porkies!  The weighing advice came from a well known retailer of batteries.

I only buy authentic marked cells now they last a long while as well.
regards Roy

Yes, these are very heavy and I have noted smaller amperage hardly any weight higher amperage's very heavy.
Logged
Gunna build those other boats one day.

malcolmfrary

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 4,827
  • Location: Blackpool, Lancs, UK
Re: Are these fair dinkum AA
« Reply #8 on: February 25, 2017, 09:12:37 AM »

A Wiki on rechargeable alkaline batteries - https://en.wikipedia.org/wiki/Rechargeable_alkaline_battery
it seems that they need care in selection of the job tat they are to do, and have a limited number of recharge cycles.
From the link -
Quote
If they are discharged by less than 25%, they can be recharged for hundreds of cycles to about 1.42 V. If they are discharged by less than 50%, they can be almost fully recharged for a few dozen cycles, to about 1.32 V. After a deep discharge, they can be brought to their original high-capacity charge only after a few charge-discharge cycles.
Logged
"Trying is the first step towards failure" - Homer (Simpson)
Pages: [1]   Go Up