I am looking to replace an existing 12v Lead Acid battery configuration (two 7.5Ah batteries in parallel) for an old practice tennis ball machine. The machine consists of 12v dc motors and sensors to deliver overall speed, spin, height, etc., with some electronic circuitry to control the motors in tandem after receiving adjustments from analog dials.
Might a Lithium Ion battery be a viable replacement? The attractive qualities are the decreased weight and increased capacity.
My understanding is that most Lithium Ion batteries come in roughly 3.6v cell configurations which are then connected in series, generating 10.8v for a group of 3 cells. Some sellers call the resulting battery a "12v" and indicate the 10.8v is a "nominal charge". My impression is that the cells can also be slightly overcharged to exceed the 3.6v individual capacity. Is all this correct? Could a 10.8v Lithium Ion battery be used to replace a 12v dual 7.5Ah battery setup?
The dual 7.5 Ah setup powers the machine for approximately 3-4hrs; what would a good recommendation for that or, preferably, a longer period be?
Are there any potential drawbacks of foregoing Lead Acid and using Lithium Ion in this application?
Any recommendations on what would be a good lithium ion battery and charger configuration for this, or any other alternatives?
I really appreciate the help! Thanks!