flash carts use a dramatic amount of extra battery, usually at least 100ma and older carts tend to be worse (some can double power use) I'd personally suggest the EZ Flash Omega Definitive Edition for low power use flash carts
Man we were gonna have a game night at my buddy's house but he wasn't feeling great so he canceled, which throws my dinner plans up into the air, so I guess it's time to order a pizza or something