I'm building a project that has 8x 5mw lasers, each requiring 3 volts. To power the lasers, I have 4 AAA rechargeable batteries. They are currently wired in parallel, as that is how they are wired when in the charger. I would like to wire the batteries in series to achieve the 3 volts total output, yet still be able to recharge them WITHOUT removing them from the device.
Is this safe/possible/advisable?
Do the batteries HAVE to be in parallel to be charged? I'm concerned about mixing the polarity, but not sure if its a valid concern.
The attached schematic below is how I think it should work, but I'm not sure its safe or will work.
NOTE: Battery 5 is actually the wall charger for the batteries. Additionally, S2 and S3 cannot be closed at the same time because of how the switches are built.
Is this safe/possible/advisable?
Do the batteries HAVE to be in parallel to be charged? I'm concerned about mixing the polarity, but not sure if its a valid concern.
The attached schematic below is how I think it should work, but I'm not sure its safe or will work.
NOTE: Battery 5 is actually the wall charger for the batteries. Additionally, S2 and S3 cannot be closed at the same time because of how the switches are built.