Hi everyone, I don't have an M403 and am not very well read on them but I ran across $6.00 batteries at HealthCabin and thought that these might be pretty cheap if any one was interested. I'll post the link, just figured it might be able to help someone out. I don't know if this is cheap but it seems like it might be. Sorry for the bother if its not!
Matte Black Battery With Golden Line for M403(Liquidation sale) [M403] - $6.00 : Healthcabin Electronic Cigarettes - Wholesale and Retail
Matte Black Battery With Golden Line for M403(Liquidation sale) [M403] - $6.00 : Healthcabin Electronic Cigarettes - Wholesale and Retail