Short answer: Bosch’s 18V Professional batteries are compatible across Bosch’s own 18V tools and chargers — Bosch states its EXPERT 18V High Power batteries are “forward and backward compatible” with Bosch 18V tools. On top of that, Bosch runs AMPShare, a multi-brand battery alliance: the same Bosch 18V battery also powers 18V tools from other participating brands, but only the specific products those brands have officially entered into the Alliance — not their entire catalog.
Are Bosch 18V batteries compatible across all Bosch 18V tools?
Yes. Bosch states that its EXPERT 18V High Power batteries are forward and backward compatible with Bosch 18V cordless power tools and chargers — meaning a current battery works in older Bosch 18V tools, and older batteries work in current tools, within the 18V Professional line.
What is AMPShare, and which brands are actually in it?
AMPShare — Powered by Bosch is described by Bosch as “the battery system for trade and industry professionals seeking multi-brand compatibility.” The official AMPShare page states that AMPShare batteries and chargers work with Bosch 18V power tools and with 18V cordless products that are part of the multi-brand AMPShare Alliance.
The brands named as Alliance members on Bosch’s official US AMPShare page: Bosch Tools, Fein, Rothenberger, Wagner, Steinel, Titan, Cox Dispensers, Honsel, LED Lenser, Leister, Mato, Mesto, Orgapack, Bosch Rexroth, Signode, and SUITX.
Editorial note: being an “AMPShare Alliance member” doesn’t mean a brand’s entire tool catalog runs on the shared battery — it means that brand has specific products built into the Alliance. Before assuming a Fein or Rothenberger tool takes a Bosch AMPShare battery, check that the specific product is listed as part of the Alliance, the same caution that applies to any multi-brand battery system.
What battery capacities does Bosch offer?
Bosch’s EXPERT 18V High Power line is available in 4Ah, 6Ah, 8Ah and 15Ah capacities. Bosch positions the 4Ah/6Ah packs as “a great blend of power and ergonomics” for everyday tools, and the 8Ah/15Ah packs for “maximum power and runtime” on high-demand applications — Bosch’s own framing, not an independent test result.
Bosch also sells an older-generation battery line under the CORE18V name — for example, the GBA18V40, a CORE18V Lithium-Ion 4Ah pack that Bosch bundles with current tools rather than an EXPERT-branded battery. CORE18V and EXPERT are both part of the same 18V Professional platform; the naming difference is about product generation and marketing line, not a separate voltage or incompatible connector.
What does a Bosch 18V Professional tool actually look like on paper?
As a concrete example, Bosch’s GSR18V-975CB25 drill/driver is rated for up to 975 in-lbs of max torque, weighs 3.4 lbs (tool only), and uses a 1/2″ chuck. Bosch sells it as a kit with two GBA18V40 CORE18V 4Ah batteries and an 18V charger — a real, current example of what a Bosch 18V Professional tool-and-battery kit contains, rather than a marketing-page abstraction.
How this was checked
This guide is based on Bosch’s US pages: the EXPERT Batteries page on boschtools.com and the official AMPShare US page. It does not cover Bosch’s separate POWER FOR ALL consumer/DIY system, which is a different platform from the professional-grade 18V line and AMPShare Alliance covered here.
Sources checked: 2026-08-05. A new review date will only be set after the linked pages are re-checked.