Your said items should meet car's electric cables safe current passing limit to avoid any mishap of fire, but if your car wiring was amended as per new load Or luckily is survived till now then said items are definitely eating up car battery life quickly, however now a new battery with little more amps (from stock battery amps) can resolve the RPM as well as decrease in battery life issues, if car other things are working fine as you have mentioned earlier.
But please double check your car those wires which are under heavy load due to new gadgets to avoid any inconvenience when you use them for long period of time like on long journey as at time they can heat up and might fail or may cause any major problem.
Just keep in mind that car wires, battery and car's battery charging system etc. has a limit, please regard them. Thanks