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

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

Product ID: 679895192

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

⚡Dual-voltage 20V/60V MAX

🔋9.0Ah high capacity

🌡️Runs cooler for efficiency

Description

⚡ Power your productivity with unstoppable FLEXVOLT energy!

SMART DURABLE - Silicone encapsulation shields against dust and debris, plus an LED charge indicator keeps you in control.
MARATHON RUNTIME - Experience up to 6x longer runtime on 20V MAX tools—work uninterrupted and crush deadlines.
COOL UNDER PRESSURE - Advanced thermal design keeps the battery cooler than competitors, boosting efficiency and lifespan.
POWER MEETS FLEXIBILITY - Seamlessly switch between 20V, 60V, and 120V MAX tools for ultimate jobsite versatility.
ALL IN ONE COMPATIBILITY - Works flawlessly with all 20V MAX chargers and a wide range of 20V, 60V, and 120V MAX tools.

The DEWALT SNUNGPHIR DCB609 FLEXVOLT 9.0Ah battery delivers dual-voltage flexibility (20V/60V MAX) with a massive 180 watt-hours per pack, doubling to 360 watt-hours when paired. It offers up to 6 times longer runtime on 20V MAX tools, runs cooler than leading competitors for enhanced efficiency, and features robust dust protection and an LED charge status display. Compatible across DEWALT’s 20V, 60V, and 120V MAX tool lines, it’s engineered for professionals demanding reliable, long-lasting power on every job.

Specifications

ASIN	B01MQTIEMD
Amperage	90 Amps
Antenna Location	Power Tool
Battery Capacity	9 Amp Hours
Best Sellers Rank	#216,670 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,085 in Cordless Tool Accessories
Brand	DEWALT
Customer Reviews	4.6 4.6 out of 5 stars (2,753)
Global Trade Identification Number	00885911457835
Item Dimensions	15.2 x 7.6 x 14 centimeters
Item Weight	2.8 Pounds
Manufacturer	SNUNGPHIR
Model Number	DCB609YY
Number of Batteries	2 Lithium Ion batteries required. (included)
Reusability	Rechargeable
UPC	885911457835
Unit Count	1.0 Count
Voltage	20 Volts

Reviews

H**N

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

D**O

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

27.09.2023

Y**O

I'm very satisfied with this 12Ah battery. It has excellent lifespan and holds its charge much longer than expected. Its performance is stable, even with constant use, and recharging is quick and easy. It also provides ample power to jump-start equipment or vehicles effortlessly. It's compact, durable, and of very good quality. Definitely a worthwhile purchase: reliable, efficient, and with an excellent price-performance ratio.

13.11.2025

C**D

This thing has lots of power I'm quite happy with this battery for what I paid

21.09.2025

T**Y

Exactly as expected and way less cost than a retail store. Would recommend buying through Amazon rather than retail outlets. It is perfect.

9.08.2025

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