The L 300 10-10 charger quickly charges up to 10 receivers and up to 10 x BA 300 rechargeable batteries in parallel. It is especially easy to use since the receivers can be inserted into the charging compartments either way round. Compatible with RI 830/RI 830 S, HDI 830, RI 900, RR 840/RR 840 S receivers and BA 300 rechargeable batteries.