Well theres no easy way to determine battery life on a 1:59 intermittent use as its not one of the standard IEC60086-1 & -2 tests. However you should be able assess likely life from manufacturer data (see attached). Looking at the data, your figure doesn't seem unreasonable.
You'd be better of with a Lithium rechargable. The lower internal impedance (10mOhm v 125mOhm) and flatter discharge curve would give better results and lower run costs, at the expense of added complexity/upfront costs.
You'd be better of with a Lithium rechargable. The lower internal impedance (10mOhm v 125mOhm) and flatter discharge curve would give better results and lower run costs, at the expense of added complexity/upfront costs.
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