Bought a cheap cordless tool from Amazon — a Blue Ridge drill, an MZK mower, a Hychika saw — and now need a spare battery? This hub covers what’s officially documented for the budget and marketplace brands people ask us about most, which brands have quietly gone dormant, and what to do when the battery is the weak link. The short version: none of these brands publishes any cross-brand compatibility — but the details per brand matter.
Quick Answer
- Within a brand: most budget brands run one battery platform per voltage — but several scope it to a logo (“Omega 20V”, “POWR+”), not the whole brand history. Match the logo on tool and battery.
- Across brands: no budget brand we’ve researched documents any cross-brand battery compatibility. Marketplace adapters are unofficial and carry real safety risks.
- The bigger risk is supply: several of these brands now show sold-out or delisted batteries. Before buying any budget cordless tool, check a replacement battery is actually purchasable.
- Surprise finding: some brands UK buyers search for aren’t UK brands at all — Benchmark and Radley are Canadian (Home Hardware), ToolPro is Australian (Supercheap Auto).
At a Glance: What Fits What
Every brand below runs one proprietary pack per platform. The column that matters most is the fourth one — and it reads the same the whole way down.
| Brand | Platform | Fits its own tools? | Cross-brand fit | UK availability | Spare battery status |
|---|---|---|---|---|---|
| Blue Ridge | 18V (Max 20V) | BR9002 pack fits Blue Ridge 18V tools | None documented | Amazon UK only | Listings date from 2019–21 — check before relying on it |
| Benchmark | Omega 20V | Only tools carrying the Omega 20V logo | None documented | No UK channel (Home Hardware, Canada) | Canada only |
| MZK | 20V | Official: interchangeable across all MZK 20V products | None documented | Amazon UK (kits); no standalone pack found | Official store showed 4Ah sold out |
| Seesii | 20V / 21V | Maker lists packs as fitting all Seesii tools | None documented | Amazon UK, active | Actively listed |
| Hychika | 18V / 20V | Sold “for Hychika tools” — no blanket all-tools claim | None documented | Amazon UK | Official store showed 2Ah sold out |
| Radley | 20V Max | Only tools carrying the POWR+ logo | None documented | No UK channel (Home Hardware, Canada) | Canada only |
| Rockwell | 18V LithiumTech | Within the 18V LithiumTech line | None documented | No official UK channel | RW9161 effectively unobtainable new |
| ToolPRO | 12V | Spare packs sold across the 12V range (wording unverified) | None documented | No UK channel (Supercheap Auto, AU/NZ) | AU/NZ only |
| Stanley FatMax | V20 (18V) | Official: interchangeable across V20, 50+ tools | None — incl. Black+Decker & DeWalt | Widely stocked in the UK | Readily available |
Recommended Batteries
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Availability and stock notes reflect the date of checking and move quickly with marketplace brands — re-check before buying.
Brand-by-Brand: What’s Officially Documented
Blue Ridge (18V / “Max 20V”)
Blue Ridge is a trademark of Positec — the same group behind Worx and Rockwell — sold in the UK as an Amazon-only brand. The spare battery is the BR9002 18V (Max 20V) 4.0Ah, and its listing states it’s for Blue Ridge 18V tools (drills, trimmers, hedge cutters, sanders, multi-tools, recip saws and jigsaws in the BR28xx/BR81xx/BR82xx ranges). The listing carries “Powershare Platform” branding — the same platform name Positec uses for Worx — but no official statement anywhere says Blue Ridge packs fit Worx tools, so we don’t claim it and neither should sellers. Most Blue Ridge listings date from 2019–2021; check the BR9002 is in stock before relying on the platform long-term.
Benchmark (Omega 20V) — a Canadian brand
Benchmark is the house brand of Home Hardware, Canada. Its current packs are branded Benchmark Omega 20V (2.5Ah and 8.0Ah), and the official wording is precise: compatible with Benchmark cordless products “with the Benchmark Omega 20V logo” — older Benchmark 20V tools without the Omega logo aren’t covered by that statement. There’s no UK retail channel; UK owners have generally bought grey imports, and replacement supply runs through homehardware.ca only.
MZK (20V)
MZK (“magic zaker”) is an Amazon garden-tool brand of S&G International Industry Inc. Its official site states its 20V battery is an “interchangeable battery for all MZK 20V products” — a genuine one-platform claim within the brand. The catch: at the time of checking, the official store showed the 20V 4Ah pack sold out, and we found no standalone MZK battery listing on Amazon UK (only tool kits and a charger). If you own MZK kit, a spare battery bought now is cheap insurance.
Seesii (20V/21V)
Seesii (a Blueskysea Group brand) is active, with current Amazon UK listings for impact wrenches, ratchets, mini chainsaws and polishers. Its replacement packs are marketed as 21V (2.0Ah/4.0Ah, e.g. SE4000T) and manufacturer listings describe them as compatible with all Seesii power tools — though some battery listings name only specific tools, so match your exact model against the listing before ordering.
Hychika (18V/20V)
Hychika (Shenzhen ZhongJing Technology) sells 18V/20V packs (2.0Ah, 4.0Ah) and chargers (HC1820, HC1840). Official pages sell batteries “for Hychika power tools” but stop short of a blanket all-tools claim, advising buyers to confirm their tool model — do exactly that. The official store showed the 2Ah pack sold out at the time of checking; Amazon UK listings exist but brand activity looks reduced. Treat spares as at-risk.
Radley (20V Max) — not the UK Radley
The “Radley” cordless tools people search for are another Home Hardware Canada exclusive (batteries JDB5188 5.0Ah and a 2.0Ah pack), officially compatible with Radley products carrying the POWR+ logo. It has no connection to the British handbag brand, and no UK retail channel exists.
Rockwell (18V LithiumTech)
Rockwell is a Positec brand focused on North America. Its legacy 18V “LithiumTech” line used the RW9161 pack (later 20V tools used RW9351); today the brand centres on Sonicrafter oscillating tools and genuine RW9161 packs are effectively unobtainable new — the market is third-party replacements and used packs. If you run vintage Rockwell 18V kit in the UK, plan its retirement rather than chase batteries.
ToolPro (12V) — an Australian brand
ToolPRO is the house brand of Supercheap Auto (Australia/NZ). Spare 12V packs (2.0Ah and 4.0Ah) and a 2A charger are sold as separate SKUs alongside its 12V tool kits — in Australia and New Zealand only. There’s no UK channel.
Stanley FatMax V20 (18V) — the mainstream comparison
Stanley’s V20 system (18V in UK naming; batteries SFMCB202 2.0Ah, SFMCB204 4.0Ah) is a real, widely-stocked UK platform — the official line: battery packs are interchangeable with other V20 products, across 50+ tools. The question we’re asked constantly: do FatMax packs fit Black+Decker or DeWalt tools, since all three are Stanley Black & Decker brands? No — each runs a deliberately separate pack and rail design, and no official cross-compatibility exists. Only unofficial adapters bridge them. Our Stanley Black & Decker 20V cross-compatibility page covers that family in detail, and the main compatibility chart shows how the mainstream platforms line up.
The Pattern (and What to Do About It)
Across every budget brand the story repeats: one proprietary pack per platform, zero documented cross-brand compatibility, and battery supply that can vanish while the tools still work. Practical rules:
- Before buying: check the brand sells a standalone replacement battery, in stock, today. If not, the tool has a built-in expiry date.
- If you already own one: buy the spare pack while it’s available.
- If the battery’s dead and unobtainable: a third-party replacement pack is the only route — read are third-party tool batteries safe? first, and stick to certified packs from sellers with a returns route.
- Adapters: 3D-printed and marketplace adapters exist for some of these platforms precisely because no official route exists. They bypass the electrical protection design — see our adapter guide for the risks before considering one.
Safety: Third-Party Packs and Cheap Cells
The Power Tool Institute warns that aftermarket and counterfeit packs may lack proper protection circuitry and independent certification, with outcomes ranging from poor performance to “a battery failure that may cause a fire or explosion” — and UK fire services (including London Fire Brigade) advise using manufacturer-approved batteries and chargers and never leaving lithium packs charging unattended. With budget brands the price gap between a genuine and no-name pack is small; buy the genuine one while you can.
Frequently Asked Questions
Is there a Blue Ridge battery compatibility chart?
The official picture is one line: the BR9002 18V 4.0Ah pack fits Blue Ridge 18V tools. Despite sharing Positec parentage and “Powershare” wording with Worx, no official Blue Ridge–Worx compatibility is documented.
Do any budget-brand batteries fit other brands’ tools?
No budget brand we’ve researched documents any cross-brand compatibility. Physical lookalikes exist, but pack electronics, rails and protection differ — treat every cross-brand fit as unsupported.
My budget tool’s battery is discontinued. What now?
Certified third-party replacements (where they exist) are the only route, with the safety caveats above — or retire the tool to mains-powered work and put the money toward an active platform with a long battery commitment.
Are Stanley FatMax batteries compatible with DeWalt?
No. Stanley, Black+Decker and DeWalt are all Stanley Black & Decker brands but run deliberately separate battery platforms with no official interchange.
How We Compile This Guide
Every compatibility statement on this page comes from the brand’s own listings, official stores or trademark/corporate records, checked in August 2026. Where a brand publishes nothing — which is common in this segment — we say “not documented” rather than guessing. Stock observations reflect the date of checking and can change quickly with marketplace brands.
Safety disclaimer: Lithium-ion batteries can cause fires if misused. Use manufacturer-approved batteries and chargers, never leave packs charging unattended, and treat unofficial adapters and uncertified replacement packs as a genuine fire risk. This guide is general information only; use at your own risk.
