Ask: Do you use 9v rechargeable batteries?
My guitar and wireless mic take 9v batteries. Alkaline batteries seem to have enough juice to power those. But when I use rechargeable ones (much more expensive than alkaline ones) guitar crackles and wireless mic audio drops suddenly.
It seems like there's mAh (milli ampere?) for each battery and the higher the better.
If you use 9v rechargeable batteries for your instruments, what brand do you use? Many manufacturers don't specify mAh for their rechargeable batteries.
Posted Feb 24, 2010, 5:58 PM UTC
13
mAh capacity is only one of the parameters that matter here. There are about 9(!) parameters not including the product's design itself that matter.
The latter can include how well the product was designed in the first place (many, many bad designs are routinely sold and even commercially successful) and mismatching battery ratings to product power ratings. Different battery technologies (Pb, NiCd vs. NiH vs. LiH vs. etc.) and manufacturer sizes each alter the above 9 parameters - sometimes significantly. This is why using the manufactured recommended battery is often a good idea.
This specific issue sounds like the maximum capacity and fully charge to nominal charge voltage ratio of the battery are not sufficient for the product you are putting them into - the voltage drops off too quickly combined with a design "flaw" (IMO) that makes the product very (badly) power voltage sensitive.