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

⚡4000W max output

📶Bluetooth connectivity

🔋410Wh capacity

€ 701.34

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up your productivity with smart, unstoppable energy!

ALL DAY ENERGY - 410Wh capacity means longer runtime to keep your projects moving without interruption.
SMART CONNECTIVITY - Bluetooth integration lets you monitor battery status and optimize usage from your phone.
POWERHOUSE PERFORMANCE - Unleash up to 4000W of consistent power for all your toughest outdoor tasks.
ULTIMATE SAFETY SHIELD - Multi-protection tech guards against overheating, short circuits, and overcharging for peace of mind.
ONE BATTERY MANY TOOLS - Compatible with 85+ Greenworks 82V tools—mow, trim, blow, and cultivate with a single power source.

The Greenworks 82V 5.0Ah Battery (21700) delivers a robust 4000W max output and 410Wh capacity, engineered with Bluetooth connectivity and advanced multi-protection technology. Designed to power over 85 Greenworks 82V tools, it offers reliable, long-lasting energy and smart device management for professional-grade outdoor performance.

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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