How are batteries chosen for medical devices?

for kids toys

For most apparatus, not actually installed in the human body (like a pacemaker), the brand varies. Decisions to purchase batteries are of course based on reliability, but also on length of power...

NiCd, Lithium, Lood, NiMH, Li-ion, Alkaline. I can't tell you which types are appropriate for your medical device(s), anyway!(NiCd and Lithium battery types must be disposed off properly).

That Device would become EXTREMELY flamable! if you want to still keep the device then i suggest that you clean it out really well.

Go here for a summary of the basics! http://kirkkitchenconsulting.pbwiki.com/FDA%20Medical%20Device%20Regulations