@demetria Why don't you get rechargable C batteries? I have EBL AA and AAA and they're awesome.
https://www.amazon.com/dp/B00FHVM7GC/ref=cm_sw_r_apan_glt_fabc_Z63VGJY7Z95DBVR095CR?psc=1
It's 40 bucks up front for 4 batteries and the charger but if you use their AA and AAA you'll save money in...