Bosch CORE18V 8.0 Ah Battery
(18 reviews)
Bosch's highest-capacity CORE18V pack: CoolPack 2.0 cooling and 21700 cells for 50% more runtime than the 4 Ah battery, across the full 18V lineup.
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Characteristics
- Capacity: 8.0 Ah (CORE18V, 21700 cells)
- Compatibility: Bosch 18V Professional System (CORE18V and legacy 18V tools)
- Cooling: CoolPack 2.0 technology
- Weight: 2.14 lbs
- 50% more runtime than the CORE18V 4 Ah battery
Detailed overview: Bosch GBA18V80 CORE18V High Power Battery
The Bosch GBA18V80 sits at the top of the brand's CORE18V battery lineup, the current generation of Bosch's 18V Professional System. Two layers of high-output 21700 cells deliver 8.0 amp-hours, for 50% more runtime and over 75% more power than the CORE18V 4 Ah battery, which makes it the pack of choice for heavy tools such as circular saws, angle grinders, and rotary hammers.
Bosch's exclusive CoolPack 2.0 technology cools the cells roughly 15% faster than earlier CoolPack packs and, according to the brand, extends service life by up to 135% compared with a standard non-CoolPack Bosch 18V battery. Copper end plates, power rails, and a flexible circuit board are built in to reduce internal resistance, which helps the pack sustain high current draw under load.
The GBA18V80 is engineered for the 18V Bosch Professional System and works with existing Bosch 18V tools and chargers, including the PROFACTOR line of high-torque, brushless tools. It is also part of Bosch's AMPShare system, a shared 18V platform designed to work across a growing list of partner tool brands. Note that its taller cell stack does not fit every compact 18V Bosch tool, notably some circular saws, so it is worth checking clearance against your specific tool before buying if you already own the smaller CORE18V packs.
A high-resolution charge-status indicator on the body shows the remaining level at the press of a button, and at 2.14 lbs it stays reasonably manageable for a battery of this capacity.
Our tester's review: Yoni Marchal-Laporte
With over 1000 ratings and a 4.6 average, this is one of the best-reviewed batteries in Bosch's current 18V lineup, and the pattern is unusually consistent for a power tool battery. Owners running angle grinders, saws, and impact drivers describe a clear step up in runtime over the smaller CORE18V packs, several comparing it against the 6.3 Ah option and preferring the extra reserve for all-day jobs. More than one reviewer makes a point of buying genuine Bosch after a bad experience with a cheaper compatible battery that failed within weeks. The one recurring limitation is fitment: the taller cell stack does not fit a small number of compact tools, most often an older cordless circular saw, so check clearance against your specific tool if you already own smaller CORE18V packs. Weight is the other trade-off buyers flag, noticeable on a drill held overhead for long stretches, though nobody considers it a dealbreaker given the runtime on offer. For anyone running Bosch 18V tools through a full day of work, this remains the battery reviewers recommend first.
Frequently asked questions: Bosch GBA18V80 CORE18V High Power Battery
It fits the large majority of Bosch's 18V Professional System, including CORE18V and older 18V tools, but its taller cell stack does not fit every compact tool. Several owners report it will not sit in an older cordless circular saw. Check clearance against your specific tool before buying if you already run smaller CORE18V packs.
It is Bosch's proprietary heat management system for its 18V batteries. The company states it cools the cells around 15% faster than earlier CoolPack packs and extends service life by up to 135% compared with a standard non-CoolPack Bosch 18V battery, which matters most on high-draw tools like grinders and saws.
Yes. Bosch engineered the CORE18V line to work across the existing 18V Professional System, so it charges on the same chargers and fits the same tools as earlier Bosch 18V batteries, aside from the handful of compact tools where the taller cell stack does not physically fit.
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Published on 02/09/2026