Device · Shimano

Shimano DU-EP801 (EP8, Gen.2) drive unit

verified 2026-10-13 Specs from Shimano E-BIKE compatibility chart C-525 and EP801/EP600 user's manual. Also known as: du-ep801, du-ep801-crg.

Specs

drive systemShimano Gen.2 (2nd-generation battery management)
battery voltage36

Takes

  • e-bike battery Shimano Gen.2 battery BT-EN404 / BT-EN405
    Shimano Gen.2 batteries BT-EN404 (11.6 Ah) and BT-EN405 (14 Ah); the Gen.2 dealer manual pairs them with BM-EN400 mounts.
  • 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.
  • e-bike battery Shimano Gen.2 integrated battery (BT-EN805 / BT-EN806)
    Shimano Gen.2 in-frame (swing-in) batteries on BM-EN800 / BM-EN801 mounts.
  • e-bike charger Shimano STEPS / E-BIKE charger (EC-E6002, EC-E8004)
    Shimano's EC-E6002 and EC-E8004 chargers; their manuals list both 1st-gen (BT-E...) and Gen.2 (BT-EN...) batteries as compatible.

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Good to know
  • Need a Gen.2 battery mount and Gen.2 drive unit (EP801/EP600/EP500).
  • 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.
  • Same 'common frame mount' shape as 1st-gen external batteries per Shimano's chart, but not electrically interchangeable with 1st-gen drive units/mounts.

What fits the Shimano DU-EP801 (EP8, Gen.2) drive unit?

9 parts and accessories in the graph work with this model. OEM parts first.

e-bike battery

e-bike charger

Informational only. Confirm with the manufacturer before buying or installing. Spotted a mistake? Report it.