~ Battery Guidance for Lasers ~

Hi Peeps

I have various Rechargable CR123A batteries

un-branded: 3.7 volts ~ 650 mAH
Ultrafires: 3.7 volts ~ 800 mAH
un-branded: 3.7 volts ~ 1000 mAH

I have read my new 1000 mAH batteries will fully charge up to 4.2 volts before the charger will auto stop!
& That after half an hour the batteries will settle down to about 3.9 volts

The info i've read goes on to say, that if your electrical equipment is very sensitive to voltage then not to use any rechargables.

The unbranded rechargable provided by Rayfoss was an unbranded 3.7v 650 mAH CR123A

Does anyone know if it's safe to use my 800-1000 mAH Batts?
Im thinking all these batts must go over there stated voltage once fully charged being rechargables.

As far as I was aware ,the higher the Milliamp Hour values mAH, mean't the longer the battery would last between charge
in other words how much power a particular battery will hold, & thats it!

Correct me if wrong.

netwave said:

my new 1000 mAH batteries will fully charge up to 4.2 volts before the charger will auto stop!

Click to expand...

That's normal.

netwave said:

after half an hour the batteries will settle down to about 3.9 volts

Click to expand...

That's not.

netwave said:

The info i've read goes on to say, that if your electrical equipment is very sensitive to voltage then not to use any rechargables.

Click to expand...

If your equipment breaks because there's a .2V difference from the rating, then its poorly made and will probably soon break anyway.

netwave said:

As far as I was aware ,the higher the Milliamp Hour values mAH, mean't the longer the battery would last between charge
in other words how much power a particular battery will hold, & thats it!

Click to expand...

Correct. 100mAh(milliampere hour) means the battery will (supposedly) output 100mA for one hour. It stands to reason that it will output 200mA for half hour, and 1A for six minutes.

These values are usually greatly over-stated and are dependent on a few other factors such as load and temperature.

* after half an hour the batteries will settle down to about 3.9 volts
Look up EBay Item number: 170379940147 for that Quote

This was the bit that really baffled me as 3.9v is not 3.6v as advertised. hence was a little concerned about it screwing up a Rayfoss laser by putting in this 3.9~3.6v Batt
lol

1.5V alkalines are 1.6V when new.
1.5V Energizer e² batteries are 1.8V when new.
3V lithium (non-rechargeables) are 3.6V when new.
1.2V NiCd and NiMH rechargeables are 1.3-1.4V when fully charged.
12V car batteries (lead acid) are 12.8V when fully charged.

It is by no means an uncommon occurrence.