Great sale! Great product! Love the app.

Schnelle Lieferung, alles gut geklappt

I loved that I could buy the base Ecoflow River unit to test out before spending the extra money on this booster. I had it installed in less than 10 minutes.

Def get this upgrade! You won't be sorry!

Great add on!

The added power storage increase the solar function power. But the hour spend on charging the unit is long. The weight of the unit is a little bit heavy. You definitely need more muscle to handle it.

Hands down the best bang for the buck !

This add on battery makes the Ecoflow River a powerhouse! I now have 3 Ecoflow Rivers with the extra batteries.... I use one as a UPS on my Home Theater entertainment system and one on my computer, router, printer, office in case of power outage......the third I use in my RV as a quick power source for hair dryer and coffee maker, etc without cranking up the generator.

Great add on for your eco flow. The extra battery will double it's capacity

Very easy to install. Expands your Ecoflow battery capacity. Very happy with it.

Ecoflow r 600 max is the best and extra battery even better I would advertise more

I was told that I would get a lot more hours pretty much double the hours,which hasn't happened yet. it does extend its but not what I expected.only use for 20 inch tv about 2-3 hours a week. have to charge after day 2

If you live in a condo with an extremely "in control" HOA this is a great way to have an electricity backup. While I haven't had to use ECOFLOW yet I did plug my laptop in and it worked great. I do wish the warranty registration wasn't such a pain in the *ss and that the ECOFLOW arrived with more information to connect two ECOFLOW River together. Would I buy again.....YEP!

I bought two... Easy to install... And tools included.

The extra battery was easy to install with clear instructions and the necessary tools for a quick and easy installation. Once installed everything works as intended to expand the battery wattage of your ECO Flow river 600 to now the Max. Great buy and would recommend to someone looking for a little extra power.

Battery would not fit on EF river by about 3/4 inch. Their manufacturing made a mistake. Conical spike 3/4 inch high left in plastic mold.The company made it right, Great product and customer service.

I like that you get an extra light with the extra battery

Awesome addition to my solar generation and it doubled the output.

Easy to install, automatic recognition works well.

Great upgrade. Works as described. Easily installed/attached.

This battery is a much have if you have the Ecoflow 600. It greatly increases the power of the base unit. If you are on the fence about purchasing, read some of the reviews over on YT!

This is great to have when there is no electricity available very quiet can run multiple devices my only problem is there is no cord provided to charge a car battery

Easy to install

This inverter works so well we purchased the extra battery.

Awesome product !

I love it . I was without water and lights for five day had no heat or lights. So I decided to get this so I can plug my small heater and my hot plate to it if this should ever happen again it work good for what I need it for. Thank you.

To add double the power. For when camping, or power outage. Later for a teardrop.

Great orodyct

Great way to double the battery of a River 600

I would buy this product for anyone.

A little expensive. Wish it had the plug for more battery connections. Then maybe worth the money

For the price and quality I am very pleased.

I liked this product. Without knowing what I really needed and without experience in Battery Packs I bought the River. Soon realized I needed the extra battery which helped a lot to make capacity meet my needs. But now I am maxed out in capacity. Now I have what would be the River MAX. So what about me? If I had first bought the River PRO I would have got a lot more capacity for a few $ more and would still in the future be able to double the capacity. Anyways I love this product and love it charges so fast.

value for money", "easy to install" and "noise level" are all awesome