Short answer: Every RYOBI LINK product connects to every other LINK product, including the ONE+ Battery Shelf, because LINK is one unified modular storage system rather than a split lineup. That single-platform simplicity is the main story; the battery shelf is the standout accessory, giving the 18V ONE+ battery family its own organized place inside the same system.
One system, not two
Unlike DeWalt’s separate TSTAK and ToughSystem lines, which need an adapter to bridge, RYOBI’s LINK storage range behaves more like Milwaukee’s PACKOUT: one set of connection points shared across the family. RYOBI’s own pages repeat the same compatibility claim for every LINK item checked. The LINK Tool Crate (STM104), the LINK ONE+ Battery Shelf (STM818), and the LINK Wall Rails, 2-Pack (STM504) are each listed as “Compatible with RYOBI LINK Modular Storage System.” RYOBI also says LINK “utilizes the same locking technology across the system, so you can customize it to meet your organizational needs from the workshop to the workplace.” In plain terms, crates, shelves, mobile units, and wall-mounted rails are designed to lock together without hunting for adapters or worrying about which sub-system a box belongs to.
The battery shelf is the headline accessory
The LINK ONE+ Battery Shelf is the clearest example of LINK extending beyond generic tool storage. RYOBI lists it with “4 Slots To Organize A Variety Of ONE+ Batteries,” and “20 Lb. Weight Capacity, Fitting Any Combination Of ONE+ Batteries.” That “any combination” wording refers to the different sizes and capacities within the 18V ONE+ family, not to RYOBI’s 40V batteries; the shelf is scoped to 18V ONE+ packs. It is a direct parallel to what Milwaukee does inside PACKOUT with dedicated M12/M18 battery racks: a modular storage line that also has a specific answer for batteries.
What each product is rated for
Sharing the same locking technology does not mean every LINK part handles the same load. The Tool Crate is built from “Impact Resistant Material with a 50 Lb. Load Capacity,” and RYOBI says it can “Stack on LINK Mobile Storage or Hang on LINK Wall Rails,” releasing with a “One-Touch Release” mechanism. The Wall Rails, meanwhile, are rated “75 Lb. Per Linear Foot,” made of “high strength polymer material,” and are “33 in. wall rails with visible mounting points for maximum stud engagement.” Those per-product ratings matter when you are deciding whether a wall rail can carry a loaded crate, or whether the battery shelf is better off holding only batteries.
There is no claim here that LINK works with non-RYOBI storage brands; the compatibility discussion is strictly LINK-to-LINK. And the battery shelf’s “any combination” claim stays inside the 18V ONE+ family, so do not expect it to accommodate 40V packs.
Practical takeaway
Any LINK product connects to any other LINK product, so there is no split system to navigate. Match the weight rating to the job: use the Tool Crate (50 lb.) for general tools and parts, the Wall Rails (75 lb. per linear foot) for mounted storage, and the Battery Shelf (20 lb., four slots) specifically to keep 18V ONE+ batteries off the workbench and out of the junk drawer. The shelf fits any size of 18V ONE+ battery, but it is not a place for RYOBI’s 40V batteries.
How this was checked
Facts on this page are drawn from RYOBI’s own LINK Tool Crate (STM104), LINK ONE+ Battery Shelf (STM818), and LINK Wall Rails, 2-Pack (STM504) product pages, plus consistent LINK system marketing copy across current product listings.
Sources checked: 2026-08-11. A new review date will only be set after the linked pages are re-checked.