You can spend $79.95 on White's heavy duty NiMH rechargeable battery pack or even $134.95 for the battery and charging stand OR you can build a new 3400mAh Li-ion battery pack that fits directly into your V3i, VX3, DFX, and XLT metal detectors for just under $75.00.
No soldering, sanding, or wiring. Just purchase the new battery pack, Li-ion batteries (3), and a Li-ion charger. The charger will also charge NiMH batteries in addition to Li-ion batteries.
1. The battery pack holder assembly. I purchased it on ebay from seller sn0wboarder. http://www.ebay.com/itm/282206451575 Li-ion-battery-3-7v-18650-holder-for-Whites-Metal-Detector. It is shipped from the Ukraine and took 8 days to arrive. Tracking information was provided. $22.00 plus $5.00 shipping. $27.00 total. Sn0wboarder sells out fast so keep checking back.
The ebay seller for the battery pack holder assembly is also on Findmall Spectra V3/V3i/VX3 Forum under username romanchuksl.
2. Li-ion batteries. Three (3) are needed. I also purchased these on ebay. Panasonic NCR18650B Li-ion battery 3400mAh from ebay seller r-lsales. $21.75 for three batteries and free shipping. The batteries are wide button top, 69.19mm in length and 18.64mm diameter. They have the protected circuit built in. I would suggest NOT using unprotected batteries.
3. Battery charger. XTAR VC4 Battery Charger from ebay seller sportinggearunlimited. $25.99 with free shipping. Simple to use! Place the three batteries in the charger and plug it in...that's it. You can monitor individual cell voltages and mAh at the press of a button if desired.
Total cost: $74.74.
Copy and paste the seller names above in red and do an advanced search on ebay for the sellers of the batteries and charger...or you may find them cheaper elsewhere.
I received the batteries and charger first. The batteries were not initially charged. I placed them in the charger and 5.5 hours later they were fully charged to 4.20vdc each. They sat for three days and I rechecked the voltage and they were at 4.17. The readings were identical on each battery.
Two days later I received the battery pack holder. I put the batteries in the new holder. Checked the voltage and then inserted the battery pack in the V3i. When I turned it on the battery level indicated 12.39vdc.
I will admit when I first saw the size difference of AA verses Li-ion 3.7vdc I was concerned about them fitting into the detector. No worries...the new setup slides in the detector just like the original battery pack.
The Li-ion battery pack setup weighs 4.7 ounces less than the PowerEx NiMH battery pack.
Pricing as of October 12, 2016.
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