Shimano BT-EN605 battery (504 Wh, Gen.2)
verified 2026-10-13 Specs from Shimano Special Battery and Parts user's manual (Gen.2) UM-7K10A-002 and compatibility chart C-511. Also known as: bt-en605, bt-en605-a.
Specs
| wh | 504 |
|---|---|
| capacity ah | 14 |
| voltage | 36 |
| mount | external (down tube) |
| generation | Gen.2 |
Fits
- e-bike battery Shimano Gen.2 external down-tube battery (BT-EN604 / BT-EN605 / BT-EN606)
Shimano Gen.2 frame-mounted (external) batteries on the BM-EN600 mount.
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Good to know
- Same 'common frame mount' shape as 1st-gen external batteries per Shimano's chart, but not electrically interchangeable with 1st-gen drive units/mounts.
- Shimano Gen.2 (BT-EN..., used with EP801/EP600/EP500) and 1st-generation (BT-E...) components: 'With some exceptions, first-generation and Gen.2 products ... are not compatible with each other.' Gen.2 batteries and mounts are marked 'Gen.2'.
- 'EP8' is used for both the DU-EP800 (1st gen) and DU-EP801 (Gen.2), and 'EP6' for DU-EP600 (Gen.2); check the drive-unit model number, not the marketing name.
- Shimano: 'It is recommended to use a SHIMANO genuine battery' and 'Use the specified battery and battery charger combination for charging.'
- The battery must also match the bike's battery mount and frame; Shimano's chart lists compatible mounts per battery. Watt-hours here are 36 V x the Ah Shimano states.
What does the Shimano BT-EN605 battery (504 Wh, Gen.2) work with?
3 models in the graph.
Informational only. Confirm with the manufacturer before buying or installing. Spotted a mistake? Report it.