Part / accessory · Shimano

Shimano BT-E8020 integrated battery (504 Wh, 1st gen)

verified 2026-10-13 Specs from Shimano Special Battery and Parts user's manual UM-7GP0B-005 and compatibility chart C-511. Also known as: bt-e8020.

Specs

wh504
capacity ah14
voltage36
mountintegrated (BM-E8020)
generation1st gen

Fits

  • e-bike battery Shimano STEPS 1st-gen integrated battery BT-E8020
    Shimano's early in-frame battery BT-E8020 on the BM-E8020 mount.

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Good to know
  • Uses its own BM-E8020 mount; not interchangeable with the later BT-E8035/BT-E8036 integrated batteries.
  • 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-E8020 integrated battery (504 Wh, 1st gen) work with?

9 models in the graph.

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