does this 2.5ah battery outperform the standard 2ah unit? if so, how much??

The 2.5Ah battery will provide a bit more runtime than a 2.0Ah battery. Approximately 25% more than a 2.0Ah battery.

Is this listing for a 6 amp 40V (see picture) or 80V 2.5Ah (see heading)?

I missed that photo mess up! Looking down through the description and other toys they show are 80v. I got the Greenworks leaf blower GBA80250 80V 2.5Ah Lithium Ion Battery with a spare. The batters seems to be last longer between charges now that I have had it awhile Only issue with the blower was the tube kept coming off. Replace the wire tie with a Aero-Seal Clamps and it swings left to right with out coming off.

Can you explain why batteries are not properly marked for amps? on the 2a-144wh 80v=1.8amp, on 4a 288wh-3.6a

The reason is that the voltage of the battery is 72V nominal/80V max. Nominal is average use volts, max is extreme use volts (surges, start-up, stall prevention etc). For example, 72V x 2.0Ah = 144Wh which would be the capacity of the battery.

Will this fit in the old style drop in charger?

McGee, your question is too vague to answer. I would not know what an "old style drop charger" is. This battery has a charger made specifically for it by Greenworks. That is the only one you can use.

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Greenworks 82V 5.0Ah Battery (21700) + Bluetooth

Greenworks 82V 5.0Ah Battery (21700) + Bluetooth

Product ID: 562357383

Details

Battery cell composition
Lithium Ion
Battery weight
2.5 Kilograms
Brand
Greenworks
Model name
2983402
Number of batteries
1 Lithium Ion

⚡45-min rapid charge

🔋2.5Ah high capacity

🔧75+ tool compatibility

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your productivity, ditch the downtime!

POWER UP IN A FLASH - Rapid 45-minute full charge keeps you moving with zero downtime.
SMART LED FUEL GAUGE - Onboard LED lights give instant power status—never get caught off guard.
ONE BATTERY ENDLESS TOOLS - Seamlessly switch between 75+ Greenworks PRO 80V tools with a single battery.
FADE FREE LITHIUM ION POWER - Consistent, high-performance energy delivery for demanding landscaping tasks.
ECO FRIENDLY MAINTENANCE FREE - Zero gas, zero emissions, and zero hassle for a cleaner, quieter workday.

The Greenworks PRO 80V 2.5Ah Lithium-Ion Battery delivers rapid 45-minute charging and fade-free power, compatible with over 75 Greenworks tools. Lightweight and equipped with an LED fuel indicator, it offers professional-grade cordless performance with zero emissions and minimal maintenance.

Specifications

ASIN	B0DK5J7NDB
Battery Cell Type	Lithium Ion
Battery Weight	2.5 Kilograms
Brand	Greenworks
Customer Reviews	5.0 5.0 out of 5 stars (2)
Item Dimensions	12.5 x 9.5 x 22.5 centimeters
Item Type Name	battery
Item Weight	7 Pounds
Manufacturer	Greenworks
Model Name	2983402
Model Number	2983402
Number of Batteries	1 Lithium Ion batteries required. (included)
UPC	195526209331

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