TESORO BATTERIES

[oneill]

Is it OK to use rechargeable batteries in the umax and Vaquero machines, I thought that I read somewhere that they are not as good as the alkalines

 

[pelanj]

If the capacity is at least 200 mAh, then rechargeable batteries are as good or better than alkaline. I use rechargeable almost exclusively. Just charge them before the hunt and you are safe. And always carry a spare one

 

[Topo]

I prefer using rechargeables with my compadre, no longer battery life compared to alkalines but more economy and the same performance, said by Tesoro

 

[:Left4Dead]

It's completely up to you guys but just so your aware, rechargable 9v most of the time only have 7.6v fully charged. AA,AAA batteries only pack 1.2v instead of 1.5 so... You will be running on low batteries all the time, well I should say lower than alkaline. But they will save you money no doubt. And I don't know if that will make a difference with the detector.

Mike

 

[BarberBill]

As long as they put out above the cutoff point of the internal voltage regulator, (which they do) they should be fine. Even though the total voltage is less than alkalines, the output is nearly flat until they die so during that stage you should be able to tell no difference.
BB

 

[pelanj]

We are talking uMax series, that means 9V block battery - there are 7 cell types which have a nominal voltage of 8.4 V, but is closer to 9 V when fully charged (I have just measured 8.89 V on mine charged some 4 weeks ago). The lower internal resistance helps also a little when actually drawing some current. IMHO there is no measurable difference in performance. I actually prefer rechargeables for their flat discharge curve. My Silver can work some 20 hours on one charge. I charge before each hunt, so most of the time I am using only some 30 % of the capacity.

 

[oneill]

THANKS EVERYONE FOR YOUR REPLIES

 

[:Left4Dead]

We are talking uMax series, that means 9V block battery - there are 7 cell types which have a nominal voltage of 8.4 V, but is closer to 9 V when fully charged (I have just measured 8.89 V on mine charged some 4 weeks ago). The lower internal resistance helps also a little when actually drawing some current. IMHO there is no measurable difference in performance. I actually prefer rechargeables for their flat discharge curve. My Silver can work some 20 hours on one charge. I charge before each hunt, so most of the time I am using only some 30 % of the capacity.

Very good info. Thanks.

 

[POLEWAGGER]

I've been using an Energizer "recharge".
These read 10.2V on full charge and settle down to 9.6 after 5min on all metal in my Cibola.
Last about 5hrs of on time detecting.
I will be doing more tests on this and other rechargeable batteries.
According to online test data, this was the ONLY rechargeable battery tested that EXCEEDED the advertised voltage and amperage capacity.
I think I paid like $12 at Frys.

 

[SkiWhiz]

I've been using an Energizer "recharge".
These read 10.2V on full charge and settle down to 9.6 after 5min on all metal in my Cibola.
Last about 5hrs of on time detecting.
I will be doing more tests on this and other rechargeable batteries.
According to online test data, this was the ONLY rechargeable battery tested that EXCEEDED the advertised voltage and amperage capacity.
I think I paid like $12 at Frys.

5 hours is plenty of detecting time for one day but I would of that that a rechargeable battery would of lasted longer especially a Energizer.

 

[joe dirt_1]

I know many use rechargeable batteries to defray the cost of good alkaline batteries, but I recently bought 9 volt Duracell coppertops at my local HD for 2.63 for a 4 pack....or about 66 cents per battery. At that price I will continue using alkalines.
I posted this price to let others know of the good buy but the post was deleted for some reason.

Roger

 

[allcav]

I would not use a rechargeable battery on the Compadre. All other machine will do fine. The Compadre is very specific on what you need to use and if you throw a rechargeable in there that is rated higher than 9 volts or over 10, it could damage the board!

 

[tabman]

I would not use a rechargeable battery on the Compadre. All other machine will do fine. The Compadre is very specific on what you need to use and if you throw a rechargeable in there that is rated higher than 9 volts or over 10, it could damage the board!

I didn't know that.

Is that because the Compadre lacks a voltage regulator to protect its circuits from overload?

tabman

 

[allcav]

No it does have a voltages regulator, but it is very specific.

 

[Marcus Detectus]

What is meant by HD? At the price joe dirt 1 listed that would mean a better price then Costco and I would take advantage of it here is Oregon if it's available. Thanks.

 

[tabman]

What is meant by HD? At the price joe dirt 1 listed that would mean a better price then Costco and I would take advantage of it here is Oregon if it's available. Thanks.

Home Depot.

Yep 66 cents is a really low price. Must have been a special.

tabman

 

[joe dirt_1]

marcus, HD means Home Depot

 

[DigDugNY]

So what regular batteries are good for a Tesoro..I got some panasonic alkaline 9 volts with my detecvtor when i bought it but i do not know where to buy them around here...do the Duracell 9v alkalines work well?

 

[POLEWAGGER]

So what regular batteries are good for a Tesoro..I got some panasonic alkaline 9 volts with my detector when i bought it but i do not know where to buy them around here...do the Duracell 9v alkalines work well?

I swear by Duracells. Have some in smoke detectors going on 3rd year and they still work and test OK. (test often)
Did some testing years ago and Duracells came in first with no real competition. This may have changed but I doubt it.
I'm going with rechargeables now for economy and high current rating. The Energizer pictured above is German made and work well for me.
Will be receiving a Maximal Power 9V 550mAh Rechargeable Li-ion Battery any day now and will post test results.

 

[oneill]

PLEASE READ AN UPDATE ON THIS SUBJECT TITLED HYBRID 9 VOLT BATTERIES you will be pleasantly surprised . Bryan