Low self discharge sub c nimh cells - UK Vintage Radio Repair and Restoration Discussion Forum

JohnBG8JMB · 9th Sep 2018, 12:37 am

Can anyone point to a supplier of LOW SELF DISCHARGE SUB C NIMH CELLS, preferably tagged?

### PLEASE NOTE - ONLY LOW SELF DISCHARGE SUB C ####

I need the low s/d feature for a battery in a remote location that can only be charged irregularly, maybe 6 months apart.; standard cells seem to die when left.

So far I've had no luck, despite well meaning help from people who haven't read the question.

cheers
JohnB

Refugee · 9th Sep 2018, 12:45 am

What voltage do you need for the full battery pack?

MrBungle · 9th Sep 2018, 12:55 am

Ansmann MaxE will do the job https://cpc.farnell.com/ansmann/5035...ged/dp/BT04685

I’d retro fit alkaline myself. Plan on replace rather than recharge.

paulsherwin · 9th Sep 2018, 10:06 am

The manufacturers seem to have mostly switched to low self discharge technology now. The giveaway is that they're sold as ready charged. I bought some cheap AAs from Lidl and they're fine with a topup charge every 6 months.

JohnBG8JMB · 9th Sep 2018, 10:27 am

Thanks for the cpc link- what I was looking for but very dear.

Alkaline cells:
don't come in sub C, no room for C.
unit draws 1.5A
and no room for a battery holder
and very expensive to run..

Lidl
OK, used them, but note they don't do SUB C

John G8jmb

The Philpott · 9th Sep 2018, 11:19 am

May be worth a look at batteriesplus.co.uk if not done so already.

(I have read the question and note you want NiMh LSD Sub C, but from general interest i am quite surprised at the capacity of the NiCd Sub C they now have. I am pleasantly surprised at how they maintain charge if left idle, provided they receive a significant charge after use, not just a quick tickle.)

Dave

MrBungle · 9th Sep 2018, 11:21 am

That's quite cheap for the class of cell. RS are selling the same ones for £13 each!

LiFePo3 packs are an option as well. Huge energy density, enough to offset the self discharge rate, cheap and reliable.

9th Sep 2018, 12:37 am	#1
JohnBG8JMB Pentode Join Date: May 2006 Location: Poole, Dorset, UK. Posts: 130	Low self discharge sub c nimh cells Can anyone point to a supplier of LOW SELF DISCHARGE SUB C NIMH CELLS, preferably tagged? ### PLEASE NOTE - ONLY LOW SELF DISCHARGE SUB C #### I need the low s/d feature for a battery in a remote location that can only be charged irregularly, maybe 6 months apart.; standard cells seem to die when left. So far I've had no luck, despite well meaning help from people who haven't read the question. cheers JohnB

9th Sep 2018, 12:45 am	#2
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,553	Re: Low self discharge sub c nimh cells What voltage do you need for the full battery pack?

9th Sep 2018, 12:55 am	#3
MrBungle Dekatron Join Date: Jun 2016 Location: London, UK. Posts: 3,687	Re: Low self discharge sub c nimh cells Ansmann MaxE will do the job https://cpc.farnell.com/ansmann/5035...ged/dp/BT04685 I’d retro fit alkaline myself. Plan on replace rather than recharge.

9th Sep 2018, 10:06 am	#4
paulsherwin Moderator Join Date: Jun 2003 Location: Oxford, UK Posts: 27,930	Re: Low self discharge sub c nimh cells The manufacturers seem to have mostly switched to low self discharge technology now. The giveaway is that they're sold as ready charged. I bought some cheap AAs from Lidl and they're fine with a topup charge every 6 months.

9th Sep 2018, 10:27 am	#5
JohnBG8JMB Pentode Join Date: May 2006 Location: Poole, Dorset, UK. Posts: 130	Re: Low self discharge sub c nimh cells Thanks for the cpc link- what I was looking for but very dear. Alkaline cells: don't come in sub C, no room for C. unit draws 1.5A and no room for a battery holder and very expensive to run.. Lidl OK, used them, but note they don't do SUB C John G8jmb

9th Sep 2018, 11:19 am	#6
The Philpott Dekatron Join Date: Aug 2016 Location: Colchester, Essex, UK. Posts: 4,103	Re: Low self discharge sub c nimh cells May be worth a look at batteriesplus.co.uk if not done so already. (I have read the question and note you want NiMh LSD Sub C, but from general interest i am quite surprised at the capacity of the NiCd Sub C they now have. I am pleasantly surprised at how they maintain charge if left idle, provided they receive a significant charge after use, not just a quick tickle.) Dave

9th Sep 2018, 11:21 am	#7
MrBungle Dekatron Join Date: Jun 2016 Location: London, UK. Posts: 3,687	Re: Low self discharge sub c nimh cells That's quite cheap for the class of cell. RS are selling the same ones for £13 each! LiFePo3 packs are an option as well. Huge energy density, enough to offset the self discharge rate, cheap and reliable.