Battery drain and potential damage to the console.

Recently started using my first flash cart which is a R4 SDHC RTS LITE playing on a DS lite. I noticed that the battery seems to drain much faster compared to using a normal DS game and want to know if thats normal for this flash cart or do all of them use more battery life? Does this shorten the total lifespan of the battery? Can this cart do an damage to the console itself be it the battery or anything else? Thank you for your time.

Edit 1: Dont know if it helps but I am using a 64g...

Battery drain and potential damage to the console.