If you are looking for the fastest way to get Bosch 18V batteries back on the job, the GAL18V6-80 6-Bay Fast Charger is the real change in this lineup. Pair it with the GBA18V60 CORE18V 6Ah battery and you get Bosch’s largest-capacity 18V pack plus a charger that charges a spent 4.0 Ah battery to 80% in 32 minutes.
The charger is the headline
Most battery announcements are about capacity, but here the more interesting engineering is in the box that refills them. The Bosch GAL18V6-80 is an 8-amp charger that, according to Bosch, delivers “4x the charging current compared to the GAL18V-20.” That is a meaningful jump, and it shows in the numbers: Bosch says the charger takes a spent Bosch 18V 4.0 Ah battery “to 80% in 32 minutes” and “to 100% in 50 minutes.”
The catch is in the second half of that cycle. The GAL18V6-80 uses “Regulated dual-mode charging – charges the first 80% fast, while the remaining 20% charges in long-life mode.” In other words, the charger is not trying to blitz the battery all the way to full. It pushes hard early, then backs off to keep the cells happier over hundreds of cycles. Bosch also includes “Active air-cooling” to manage the heat that comes with that 8-amp current.
So the 50-minute full charge is not a weakness; it is the intended result of the dual-mode design. The fast 80% is what you use during the workday. The slower final 20% is what you let happen when the pack is sitting on the charger overnight.
About those six bays
The “6-bay” name does not mean six batteries charge at full speed simultaneously. Bosch describes the GAL18V6-80 as offering “6-bay charging convenience – allows users to sequentially charge six Bosch 18V batteries.” That is sequential charging: six slots, one battery actively fast-charging its turn at a time. It is a queue, not a parallel station, which is still useful for a crew that rotates through multiple batteries but wants one charger location.
Bosch 18V chargers are “covered by a five year limited warranty,” which is a decent signal that the company expects this unit to hold up under shop conditions.
The battery side: GBA18V60 CORE18V 6Ah
The GBA18V60 is the capacity upgrade in this pair. Bosch’s product page states it “delivers 50% more runtime and over 75% more power than the CORE18V 4 Ah battery,” and that it is “compatible with Bosch 18V tools and chargers.” The page also notes it is “optimized to drive Bosch PROFACTOR tools with BITURBO Brushless Technology.” If you are running those higher-demand tools, this is the battery Bosch is pointing you toward.
Bosch 18V batteries are “covered by a three year limited warranty.” The GBA18V60 is also listed as “compatible with the AMPShare System, a battery system designed to be multi-brand compatible,” and Bosch says “18V batteries and chargers are compatible with Bosch 18V power tools and a growing list of cordless products from AMPShare brands.” This site has a separate, full guide on AMPShare covering the alliance in depth, so we will leave the brand list there.
Practical takeaway
The GAL18V6-80 gets a battery to 80% fast, in 32 minutes, then deliberately slows down for the last 20% to finish in 50 minutes. That is not the charger being slow; it is Bosch trading a few extra minutes for long-term battery health. If you mainly need to grab a battery and go, 80% in 32 minutes is usually enough. If you are topping off overnight, let it finish the full cycle. On the battery side, the GBA18V60’s 50% more runtime and over 75% more power over the CORE18V 4Ah makes it the pick for PROFACTOR/BITURBO Brushless tools specifically. And if you also own tools from other AMPShare-alliance brands such as Fein or Rothenberger, this site’s other Bosch guide covers that alliance in full detail.
How this was checked
Facts on this page are drawn from Bosch’s own GBA18V60 18V CORE18V 6 Ah High Power Battery and GAL18V6-80 18V 6-Bay Fast Battery Charger product pages.
Sources checked: 2026-08-11. A new review date will only be set after the linked pages are re-checked.