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RYOBI OP4020A: battery facts and compatibility

By 김민성 · ToolBattery editorial

Source review: 2026-10-30 · US English

OP4020A is a documented battery in the 40V system. This page identifies its sourced specifications, exact-model restrictions and the next check before use.

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Independent reference. ToolBattery is not a manufacturer or authorized service center. Model revision, region, condition and the latest manual may change the answer. Do not use an unapproved adapter or modified battery.
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Verified model facts

FieldManufacturer-sourced value
ManufacturerRYOBI
Exact modelOP4020A
Product typebattery
System40V
MarketUS
Voltage label40V
Capacity2Ah
  • The reviewed product text calls the battery Lithium; a more specific chemistry is left unnormalized until a model-specific manual or rating label is checked.
  • 40V system membership does not override the separate manufacturer physical-fit exclusions for certain older tools.
  • The manufacturer fit sheet pairs retail model OP4020A with battery identification OP40204; both are retained as aliases for lookup.
  • The manufacturer lists 2Ah capacity for this exact pack.
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What compatibility data says

  • battery to tool — RY40100: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40101: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40104: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40106: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40107: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40108: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40109: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40180: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40190: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40500: conditional. The manufacturer footnote explicitly allows physical fit.
  • battery to tool — RY40502: conditional. The manufacturer footnote explicitly allows physical fit.
  • battery to tool — RY40511: conditional. The manufacturer footnote explicitly allows physical fit.
  • battery to tool — RY40805: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40850: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.
  • battery to tool — RY40PW01BT: incompatible. Physical size prevents use in this listed older tool; broad 40V marketing claims do not override the model exclusion.

Exceptions, source limits and safety

  • Check the exact region, revision and current manufacturer instructions.

A missing rating is not zero or universal support. Charger AC input and pack-to-tool use are separate checks.

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Official sources

These source records were reviewed as of 2026-10-30; access methods differ. Open the latest manufacturer manual for your exact type, region and revision before use.

  1. RYOBI Tools USA — RYOBI OP4020A: 40V 2AH Lithium BatteryThe official US catalog identifies OP4020A as 40V 2AH Lithium Battery. Product page is undated; catalog presence and NEW badges do not establish a launch date. · full_page · Checked 2026-10-30
  2. RYOBI (manufacturer document hosted by The Home Depot) — RYOBI 40V battery physical-size exclusionsThe manufacturer matrix lists seven battery versions and fifteen older tool models with physical-size restrictions. The 2Ah and EDGE 4Ah versions are specifically permitted to fit the three listed chainsaws. All remaining listed battery/tool combinations are stated not to work because of pack size. Image-only PDF was visually inspected; i · pdf_image · Checked 2026-10-30
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