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Capt. Rob
Member
| Joined: | Thu Jul 23rd, 2009 |
| Location: | Flagler Beach, Florida USA |
| Posts: | 2 |
| Notable Finds: | | | Brand of detector you use : | Two Garretts |
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| MyPOTD: |  |
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#1 Posted: Sat Jul 25th, 2009 03:36 pm |
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What are the best rechargable batteries to get for my two Garrett's. One uses three 9volt, the other uses 8 AA. Should I get nicad or lithium? Any suggestions on where to find them reasonably priced? I am looking to start out with two sets of each. Thanks in advance for any advice and help.
Capt. Rob
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nexus777
Member
Whites Eagle Spectrum
| Joined: | Thu Aug 7th, 2008 |
| Location: | Quincy, Massachusetts USA |
| Posts: | 177 |
| Notable Finds: | 1796 half Reale ... ... | | Brand of detector you use : | Whites Eagle Spectrum |
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#2 Posted: Sat Jul 25th, 2009 04:50 pm |
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Hello Capt Rob, I use Tenergy rechargables... I use C size, but they do make AA size.. I took a magic-marker and marked 4 of them #1 & the other 4 #2. been using them for well over a year now and they work great.
Attachment: Tenergy AA 2300mah Nimh.jpg
(Downloaded 58 times)
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Goes4ever
Member
| Joined: | Sun Jul 20th, 2008 |
| Location: | Northwest, Ohio USA |
| Posts: | 1719 |
| Notable Finds: | my wife | | Brand of detector you use : | Minelab X-70 |
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#3 Posted: Sun Jul 26th, 2009 12:26 pm |
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I use rechargeables as well and would never go back to regular batteries, It is so nice not to have to buy batteries all the time, I have 3 sets so that one set is in my detector and 2 back up sets always ready to go
I get about 20 hours out of a set
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dschoen0
Member
| Joined: | Mon Mar 30th, 2009 |
| Location: | Clearwater, Kansas USA |
| Posts: | 132 |
| Notable Finds: | | | Brand of detector you use : | Garrett GTI 1500, AT PRO |
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#4 Posted: Sun Jul 26th, 2009 01:19 pm |
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I too use rechargables...for my MD, camera, handheld GPS.
Lithium batteries to seem to last longer, but can get expensive. I'm not sure if they still sell Nicads in major stores, but I also use Ni-mh (nickel-metal hydride) batteries.
It's been said that Nicads have a 'memory' and some say they should be completely discharged prior to recharging, while others say to never let them run completely down. But it seems that some of mine would develop a short and wouldn't take a charge any longer. I built a 'zapper' that would clear 'shorts' in old nicads so they would again take a charge. It worked, but they still weren't as good as new ones. I've since switched to using Ni-mh batteries. In my opinion, these batteries work much better (for me) than Nicads.
I look for rechargable Ni-mh batteries with the largest mA·h rating (refers to the discharge capacity). Nexus777 has a good photo of this...I believe his showed a 2300 mA-h. The larger the number, the longer they should hold a charge. Hope any of this helps.
Last edited on Sun Jul 26th, 2009 01:21 pm by dschoen0
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Digalot
Member
Whites Vision XTerra-70 Pro-Pointer
| Joined: | Sat Jul 5th, 2008 |
| Location: | Jefferson, Texas USA |
| Posts: | 99 |
| Notable Finds: | Diamond Ring | | Brand of detector you use : | Whites - Minelab |
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#5 Posted: Sun Jul 26th, 2009 03:17 pm |
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Ni-mh (nickel-metal hydride) batteries seem to work a lot better than Ni-Cads for me. You can damage a Ni-Cad battery if you send a reverse current thru it. This will happen if you completely discharge a series string of batteries because some cells will completely discharge before others. To use the discharge function you have to discharge each battery individually. The memory in these cells will only occur if you discharge the batteries to the same point over and over. The only problem with Ni-MH batteries is that they will overheat if pushed beyond a full charge. They need to be charged in a device made for that purpose. It contains a heat sensing device that reduces the current when it senses this rise in temperature.
The mA-h rating is the theoretical maximum current that the battery will supply for one hour. In the case of your 2300 mA-h battery that would be 2300 milli-Amps (2.3 Amps)
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