# Shimano BMR1 and BRM2 Di2 External Battery Mount Base Unit A

Shimano Di2 External Battery Mounts-   All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions
-   Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/

## Details

- **Price:** 75.0 USD
- **Vendor:** Gio's Outdoors
- **Type:** Electronic Shifter Parts
- **Tags:** Gio's Outdoors, Shopify Collective

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 75.00 USD | In stock |

## Images

- Shimano BMR1 and BRM2 Di2 External Battery Mount Base Unit A

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> Source: [Smart supply deals](https://smartsupplydeals.com/products/shimano-bmr1-and-brm2-di2-external-battery-mount-base-unit-a)
> Updated: 2026-07-22