does this 9.oah mean simply a longer running time than the 6 or 3 .oah and does this battery work with all flex volt tools such as the 60 volt grinder

three 20 volt batteries in series would have 60 volts; in parallel they would have only 20 volts. But if in parallel, you should get more amp hours (plus possibly some wasted energy as no 2 batteries are exactly the same in internal resistance; thus the strongest would discharge internally through the weakest unless they block that with diodes, which in turn should cause a little voltage loss. Theoretically it may be a bad idea to put batteries in parallel, but practically it may make little problem.

Will this work for the dcd771c2?

Actually the flex volt batteries WILL work with the 1820 adapters. You just have to trim off the two small ears on the adapter that prevent the flex volt battery from sliding all the way in. Did that quickly and easily with a cutting wheel on my angle grinder.

What does it mean by 9ah?

Dewalt flexvolt batteries can be used with either Dewalt 20V or 60V Max tools, The 9Ah battery (20V tools) has triple the capacity as a 3Ah battery. This battery is a 3Ah battery when used with 60V Dewalt Max tools. Hope this helps.

I have a flex volt 20/60 at 9 ah. it came with my dewalt weed trimmer. on low, i get about 1/2 hour work time. led display...doesn't. normal?

On LOW. What do you get for run time on HIGH? And MEDIUM? Maybe it switches to 20v on LOW So that would be 20v x 9ah = 180wh And that time that sounds about right... I know with my MW trimmer I get 30 to 40 mins with a 9ah, so you have to hurry if you only have one battery and alot of cutting... It may not seem like it should but the tablesaw gets alot more time from a 9ahbattery than a weedwacker does. Maybe someone can explain that!

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DEWALT DCB609 20V/60V MAX FLEXVOLT 9.0Ah Battery

DEWALT DCB609 20V/60V MAX FLEXVOLT 9.0Ah Battery

Product ID: 768133212

Details

Battery capacity
9 Amp Hours
Brand
DEWALT
Number of batteries
2 Lithium Ion
Recommended uses for product
Power Tool
Unit count
1.0 count

⚡9.0Ah High Capacity

🔋Dual Voltage 20V/60V Flexibility

🌡️Runs Cooler for Efficiency

€ 562.89

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Description

🔋 Power your hustle with DEWALT’s FLEXVOLT — because downtime is so last season.

COOL UNDER PRESSURE - Operates cooler than competitors’ 9Ah batteries, enhancing runtime and tool longevity.
DUAL VOLTAGE MASTERY - Seamlessly switch between 20V and 60V MAX tools for ultimate jobsite versatility.
SMART DURABLE DESIGN - Silicone encapsulated modules keep dust out and LED charge indicators keep you in control.
UNMATCHED POWER RESERVE - 9.0Ah battery delivers 180Wh per pack, doubling to 360Wh with two batteries for marathon work sessions.
ALL IN ONE COMPATIBILITY - Works flawlessly with all 20V, 60V, and 120V MAX tools and chargers—one battery to rule them all.

The DEWALT DCB609 FLEXVOLT 9.0Ah battery offers industry-leading 180 watt-hours per pack with dual voltage compatibility (20V/60V), delivering up to 6x longer operation on 20V MAX tools. Engineered to run cooler for enhanced efficiency, it supports all DEWALT MAX tools and chargers, featuring a dust-resistant silicone encapsulation and an LED charge status display for professional-grade reliability and convenience.

Specifications

ASIN	B01MQTIEMD
Amperage	90 Amps
Antenna Location	Power Tool
Battery Capacity	9 Amp Hours
Battery capacity	9 Amp Hours
Brand	DEWALT
Brand Name	DEWALT
Compatible Phone Models	Not Compatible
Customer Reviews	4.6 out of 5 stars 2,880 Reviews
Global Trade Identification Number	00885911457835
Item Dimensions	15.2 x 7.6 x 14 centimetres
Item Weight	2.8 Pounds
Manufacturer	zuyes
Model Name	20/60V 9A.H MAX FLEX BATTERY
Model Number	DCB609YY
Number of Batteries	2 Lithium Ion batteries required. (included)
Number of batteries	2 Lithium Ion batteries required. (included)
Recommended uses for product	Power Tool
Reusability	Rechargeable
UPC	885911457835
Unit Count	1.0 count
Unit count	1.0 count
Voltage	20 Volts

Reviews

D**N

Great 👍

Great 👍 👌 👍 👌

31.01.2026

H**N

Duração sensacional

Duração surpreendente da bateria, ultrapassando 1 hora de uso contínuo no soprador na potência máxima. Performance notavelmente superior quando comparada com a bateria XR 20V Max de 5Ah, que em condições similares forneceu apenas cerca de 20 minutos de operação.

12.01.2024

S**.

Perfect OEM

Absolutely perfect the same as you would get right along with your tool. This is a great replacement to have if you need an extra. Very easy to pop on the charger give it an hour and start using. Definitely one of the larger batteries and lasts a long time. They are slightly heavy so you'll notice the difference once you pop it onto your tool.

5.08.2026

D**O

Gran capacidad y rendimiento

Batería con gran rendimiento. La use en una desbrozadora dewalt y una sola carga alcanzó para todo el jardín. Excelente batería.

27.09.2023

C**.

Great battery, excellent run time

Can't go wrong with this battery. The 9ah flexvolt lasts forever on high powered tools. My go to battery when using shipvac or rotary hammer. You good alot of runtime from it and best if all, its so much cheaper on Amazon than big box stores. Highly recommend

14.08.2026

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€ 562.89

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Finland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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2 days ago

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