Unrelated to lasers.. still powa!

The original battery was made of 3 pieces of 3.6V 1.3A cells
in series... There is no reason that a Higher Amperage battery
is needed. The battery runs a DC motor and the manufacturer
decided that 1.3Amp cells were more than enough to run the
motor under load.
More expensive Higher Discharge cells won't hurt anything but
are not necessary... IMO

Chargers for Li-Ion cells work basically the same. Some better
than others. Some cheap chargers only monitor Voltage and
other more expensive ones can monitor Current and Voltage.

1) The charger puts out 4.2V per cell... at the Max Amperage
shown on the charger.

2) The voltage of the cells under charge is monitored

3) Since the Max Voltage of the charger is 4.2 Volts the Cells
under charge will slowly creep up to that voltage and the
Amperage will drop in relation.

4) Once the cells reach equilibrium at 4.2V the current should
be very low and the charger will stop charging
the cells.

5) The more expensive chargers can also check for a near
zero current before checking for the 4.2V per cell.


Jerry

You can contact us at any time on our Website: J.BAUER Electronics

lasersbee said:

The original battery was made of 3 pieces of 3.6V 1.3A cells in series... There is no reason that a Higher Amperage battery
is needed. The battery runs a DC motor and the manufacturer
decided that 1.3Amp cells were more than enough to run the
motor under load.
More expensive Higher Discharge cells won't hurt anything but
are not necessary... IMO
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Click to expand...

I do get that I am just having a nightmare of a time trying to find the exact ones lol! They are all the same but different ^^

As the years went by, the capacities went up. Those particular cells were just when the most they could pack in that chemistry was 1300mAh. You will be fine with more capacity, as long as you stay with the same chemistry. Also, ideally the charging circuit will provide a constant current to the cell, within the cell manufacturer's charging current specification, until the cell voltage reaches 4.2V, at which point the charging circuit should provide a constant 4.2V until the current that the cell draws tapers off to a trickle, at which point the circuit should cut out and the cell will be full.

Most cheap chargers just charge until cell reaches 4.2V, limiting current so that the charge current isn't too high for an empty battery.

crazydaze said:

I do get that I am just having a nightmare of a time trying to find the exact ones lol! They are all the same but different ^^

Click to expand...

Yeah... It's like Cars....

They all go...
Some go better than others...


Jerry


You can contact us at any time on our Website: J.BAUER Electronics