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rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 3:49 pm
by clint
Hello all,
just wondering can anyone advise on a good 9v rechargeble battery for use in both my Garrett pp and the xpointer?Are the type that hold their charge available?

regards

Clint

Re: rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 3:52 pm
by Beany_bot
Not sure mate, this is a good starting point http://www.metaefficient.com/rechargeab ... es-9v.html" onclick="window.open(this.href);return false;

I don't know if Eneloop do them, if they do, get them. Eneloops are the business.

Re: rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 3:55 pm
by beaubrummell
I use the attached in my Garrett Pro Pointer and have no problems. Lasts ages on one charge.

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Re: rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 4:24 pm
by davetee
Maplin do a good Hybrid one for around a tenner. Doesn't lose it's charge like normal NiMH reachargeables when stored.

Re: rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 4:42 pm
by hihosilver
Just been checking out that Maplin 9v hybrid thing as it sounded interesting. I'm trying to work out what makes it any different from every other NiMH 9v battery out there, as it's also a NiMH battery itself, according to the packaging, and all those 'features' are standard on such batteries. :-/

Re: rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 4:54 pm
by clint
Cheers!The Uniross look OK,get two plus a charger off THAT auction site for around £13..do for me!

regards

Clint

Re: rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 5:31 pm
by hihosilver
I'm not sure what minimum rating a pro pointer needs, does anyone know the voltage range they operate at as well? I think standard 9v alkalines are the equivalent of 500mah. Most rechargables I've seen are 175-250 so maybe won't last too long.

What mah rating is that one pls Morley? :-/

Re: rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 6:46 pm
by davetee
hihosilver wrote:Just been checking out that Maplin 9v hybrid thing as it sounded interesting. I'm trying to work out what makes it any different from every other NiMH 9v battery out there, as it's also a NiMH battery itself, according to the packaging, and all those 'features' are standard on such batteries. :-/
Normal NiMH batteries lose their charge over a period of time. Hybrid batteries retain most of their charge for up to 12 months. That's the difference

Re: rechargeable 9v battery for pinpointers?

Posted: Wed Nov 26, 2014 7:02 pm
by hihosilver
Those Maplin 9v's are still NiMH chemistry batteries, so I'm wondering what the 'hybrid' part is. x;

Edit: Have just read the wiki on them, quite interesting:

They make them sound like LSD Sanyo Eneloops. In our country I don't think it's possible to have any NiMH batteries retain over 80% charge for 12 months, as apparently it can only do so if stored at a temperature of 20C.
The low self-discharge nickel–metal hydride battery(LSD NiMH) was introduced in 2005. It has a significantly lower rate of self-discharge, so holds its charge longer if left charged but unused. By using an improved electrode separator and improved positive electrode, manufacturers claim the cells retain 70% to 85% of their capacity after one year when stored at 20 °C (68 °F), compared to about half for normal NiMH batteries. They are otherwise similar to other NiMH batteries, and can be charged in the same chargers. These cells are marketed as "hybrid", "ready-to-use" or "pre-charged" rechargeables. Retention of charge depends a lot on the battery's impedance or internal resistance (the lower the better), and on the physical size of the battery as well as the charge capacity.
Link here:
http://en.wikipedia.org/wiki/Nickel%E2% ... -discharge" onclick="window.open(this.href);return false;

I still think Lithium rechargeables are best. Some 600mah ones on evilbay. ::g But you must charge them in a proper lithium charger, not in a normal nimh charger. ;;z

Re: rechargeable 9v battery for pinpointers?

Posted: Thu Nov 27, 2014 11:27 am
by foundit
Energizer power plus rechargeable 9v last for ages...bought two for £12 about 18 months ago...never let me down ::g ::g
Alan

Re: rechargeable 9v battery for pinpointers?

Posted: Thu Nov 27, 2014 2:43 pm
by Comp
Thanks for the info, Guys, I would not have thought of using a rechargable for the PP, as most of them are only 7.2 Volts when fully charged, I didn't think they would have been much use, or lasted very long, I consider myself educated!!!

I will try one, and see,

Cheers, Fred

Re: rechargeable 9v battery for pinpointers?

Posted: Thu Nov 27, 2014 4:16 pm
by ROCK HOPPER
I use Aldi 9v rechargeables in my Detector pro Wader, they last very well and have been recharged many many times.
But in my Vibra probe pinpointer I use the 9vs from Lidl which last a very long time as it switches off after a min so I don't think it is worth worrying about the cost as they are about £2.50 for two.

Re: rechargeable 9v battery for pinpointers?

Posted: Sat Jan 02, 2016 1:05 pm
by clint
Just checking out the detecting supplies....low on 9v batteries...I never did buy those rechargeable ones! Probably due to the question on mah rating ie will they push out enough power etc? Can anyone offer any further info on this?

regards

Clint

Re: rechargeable 9v battery for pinpointers?

Posted: Sat Jan 02, 2016 4:49 pm
by Spiker1968
I've been using these for a few months now and they last ages, lithium holds a charge for longer. Very important to use the correct charger as lithiums can go bang in the wrong charger!!

:)

I did a discharge test on this battery, 550 Mah from 8.4v down to 6.8v, thats better than a top quality alkaline and did a bit of research and Li-Ion loses 5% in first 24 hrs and 1-2% per month after that. The Xpointer worked fine at 6.8v.

:D

Re: rechargeable 9v battery for pinpointers?

Posted: Sat Jan 02, 2016 5:48 pm
by hihosilver
I've been using one of these for just over a year now.
https://www.7dayshop.com/9v-block-recha ... attery-1pk

Lasts quite a while per charge. ::g

Re: rechargeable 9v battery for pinpointers?

Posted: Sat Jan 02, 2016 11:09 pm
by Gary_Graham
I got 50 varta 9v batteries off that site for. £21 still got loads left use them in my smoke detector too. ::g

Rechargeable batteries I use eneloop mainly but JCB do a good range.