External Battery Mount (deprecated)

SM-BMR1 / SM-BMR2 - External Battery Mount (deprecated) image

This Shimano SM-BMR1 / SM-BMR2 external battery mount was used with the SM-BTR1 external Di2 battery all the way until Shimano released the updated BM-DN100 battery mount.

Just like the later model, the older BMR1 / BMR2 come in different sizes, a long and a short version. Which one you need depends on your frame mounting options.

The short (-S) version is generally mounted underneath the bike, below the chain stay for example.
The longer -L version usually screws into the down tube bottle cage holes and allows you to install a bottle cage and an external battery.

SM-BMR1 vs SM-BMR2 vs BM-DN100

The SM-BMR1 and SM-BMR2 are basically the same device. The '2' version is newer and is of better built quality. Apparently there were some waterproofing issues with early SM-BMR1 models.

In case you're thinking of installing a D-fly or wireless unit - only the BM-DN100 will allow for BluetoothLE communications. This means that the SM-BMR1 / BMR2 only support the SM-EWW01 D-fly and SC-M9050 display. The updated BM-DN100 is required in order to use the EW-WU111 / EW-WU101 / SC-MT800 / SC-M9051.

Details & Specifications

Shimano model number:SM-BMR1 / SM-BMR2
Weight:25 g
E-Tube ports:1
E-Tube Port type:SD50
Type:Battery Holder
Component series:Non-series components NON (All)
Downloads:External Battery Mount User Manual

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