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The EPA Maximum Contaminant Levels for the metals are in the parts-per-billion range (Arsenic 10ppb, Cadmium 5ppb, Lead 15ppb, Mercury 5ppb, Selenium 50ppb)
David_Campen wrote:I wonder if that is any higher than levels for other materials sent to the dump?
Dan Sullivan wrote:Our grotto uses pailmail, and has for several years now. We take it out of the grotto funds.
http://www.batteryrecycling.com/pailmail.html
Mike Rz wrote:Radio Shack sells Ni-MH AA batteries that can be recharged in 15 minutes. Its the same battery technology used in the hybrid vehicles so there is unlimited recharges and no battery memory. The batteries cost ~4/$14 and the charger is ~$28 w/ 2 batteries. Scientific tests performed in my desk drawer indicate 4 hr life in a Mini Mag AA and 6hr in a 3AA Petzl Zoom. I forgot I was performing an LED test. Combined with my car's plug-in 12V/115VAC inverter its a great technology.
NZcaver wrote:I also prefer using rechargeables to disposables, and have been for years. With current rechargeable technologies, I don't understand why so many people (and cavers) still use alkalines/lithiums.
hank_moon wrote:Petzl America uses this same company. We get tons of alkaline batteries back lamps returned for warranty inspection, repair, etc. Good service. I would be surprised if most cavers aren't using rechargeables. Hmmm...poll fodder?
hydrology_joe wrote:Currently I work in soil & groundwater remediation at closed landfills & contaminated drycleaner sites (among other duties and hence the screen name).
Dan Sullivan wrote:Our grotto uses pailmail, and has for several years now. We take it out of the grotto funds.
http://www.batteryrecycling.com/pailmail.html
Lava wrote:I use alkaline AAs in my backup light on my helmet. The problem is my main light, which runs on rechargeable lithium-ion packs, is so reliable I never turn my backup light on. In the past I have found that rechargeable AA cells lose their charge quickly sitting in a backup light unused, compared to alkaline AAs. But the last time I tried this was over 10 years ago, so maybe I should give it another shot now that the technology has likely improved. How long do your unused rechargeable AAs keep their charge?
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