40 Ah Portable Lithium Battery
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When your weekend calls for backcountry campsites away from all amenities and ties to the outside world, bring along the 40Ah Portable Lithium Battery from Dometic to charge your compressor cooler or devices so your drinks stay cool and your selfies stay fly. Using state-of-the-art technology, this 16lb portable charger has three modes of charging for AC, DC, or USB. It also includes a port for solar to plug in so you can keep it juiced all week long. Aside from it's technical ingenuity, this battery is lightweight and compact enough to add to any camping kit for ice-free cold food and easy device charging.
Details
- Portable charger for compressor coolers, phones, and more
- Multiple charging ports depending on the device
- Receives solar panel to stay charged longer
- Digital display reads battery level for recharging
- 40amp hours of battery to charge a cooler all weekend
- Item #DET000D
- Material
- lithium iron phosphate
- Battery Type
- Lithium Iron Phosphate
- Capacity
- 40Ah
- Charge Time
- 40amp hours
- Input
- 12v
- Output
- 12V, 15A
- Dimensions
- 7.76in x 10.02in x 7.76in
- Claimed Weight
- 1lb
- Manufacturer Warranty
- 2 years
Reviews
Q&A
What do you think about this product?
Overall Rating
4 based on 53 ratings
Review Summary
Fits True To Size
Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.Customer Images
Here's what customers have to say
The portable power supply offers long battery life and fast charging, allowing users to effectively power a range of outdoor and camping equipment. However, some technical issues have been reported, such as problems with the display, battery not holding a charge, and difficulties with solar charging. The power output plugs may also be less secure than desired. Overall, the product is seen as a useful solution for powering outdoor gear, but may require troubleshooting to address the reported technical problems.
AI-generated from the text of customer reviews.
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Selecting an option will reload the available reviews on the pageSeptember 22, 2025
Unreliable
Plugs do not securely attach and can become loose during transport. The vague power button leaves you unsure if the unit has powered off resulting in numerous drained batteries. I can only count on the unit not operating to keep the cooler/freezer running and the app does not alert to failures.
Originally reviewed on DOMETIC
September 17, 2025
New experience with PLB40
happy with my PLB 40 , although it has an unpleasant odor when in use ( hopefully this will decrease over time), just received and have only used a few times...and fully charged 2 times due to testing over several days. I would like to hear some feedback about that from DOMETIC technical...thank you
Originally reviewed on DOMETIC
September 7, 2025
Battery plb40
Works as stated. I run in line with my cooler so when my truck is running it charges and when it isn’t the cooler is still cold.
Originally reviewed on DOMETIC
September 4, 2025
Works as the website ststed
Good battery overall and worked as advertised. Kept a cfx3 continuously powered for close to 40 hours.
Originally reviewed on DOMETIC
June 11, 2025
Love the battery, after sales support no so much
Battery is great, but missing fuses. Dometic unable to get me replacements.
Originally reviewed on DOMETIC
June 2, 2025
Worth the cost!!!!
Runs my CX5 cooler, in my car, for about four days without recharging! It takes a while to recharge it, especially with the vehicle charger. But once it's charged, it stays charged for a long time! Plus, the small footprint helps when you're packing your car with Charis, tents, and other bulky things! It's 100% silent - not even any clicking or fan sounds. Sleek design and easy to use!
Originally reviewed on DOMETIC
March 10, 2025
Worth money
Bottom line, this is my second power bank for the second car. The first one I have 3 years. No issues. Keep my fridge in the car running for 2-3 days (summer vs winter) without any need for additional charging. Solid and durable produce. Love it.
Originally reviewed on DOMETIC
February 6, 2025
Great Battery!
I just got a chance to test the PLB40 and was pleased to see it only used 35% of capacity over 18 hours of CFX3 45 fridge use. This includes initial startup. Look forward to more use under other conditions. Very well made also!
Originally reviewed on DOMETIC
September 6, 2024
works, but...
Support on this item has been pitiful, at best....
Originally reviewed on DOMETIC
August 29, 2024
gary haines review
The battery is awesome for road trips. BUT....I DID NOT GET A 5% DISCOUNT ON MY FIRST PURCHASE FROM YOU GUYS. Still.....awesome for road trips where sites have no electrical hook ups
Originally reviewed on DOMETIC
Do you have a question about this product?
July 9, 2024
Maybe someone in the community can assist: Dual Battery "Always on 12V" Socket PLB40/CFX345 I have PLB connected to 12V socket and it doesn't appear to be accepting a charge but battery powers all + CFX directly. My vltg is ok. Any thoughts?
Originally reviewed on DOMETIC
April 27, 2021
Can you charge the battery via solar and power a fridge simultaneously? Will this work with other fridges that run on a 12v socket/plug?
Originally reviewed on DOMETIC
January 28, 2021
How long does it take to recharge battery using 100W solar or 120V wall plug?
Originally reviewed on DOMETIC
January 4, 2021
Can I use a 100 watts solar panel with a mppt charge controller to charge the PLB40? this way I can maximize the power from the solar panel and I hope I could run my CFX-50 indefinitely.
Originally reviewed on DOMETIC
January 3, 2021
Hi, is simultaneous solar and vehicle DC charging possible with the PLB40? I would like to have my roof mounted solar panel connected at all times and charge via vehicle when driving without having to constantly swap the plugs. Thank you :)
Originally reviewed on DOMETIC
December 28, 2020
Can you plug one PLB40 in to another PLB40 to double the amount of time it will power a cooler?
Originally reviewed on DOMETIC
November 11, 2020
I bought a dometic 95 CFX , but got stolen now I still have my dometic plb 40, my question is how can I plug a coffe machine it has no way where to plug it? Thanks
Originally reviewed on DOMETIC
November 3, 2020
My screen display went out. I have used this 4 times. How do I get in touch with support?
Originally reviewed on DOMETIC
October 28, 2020
Hello, can you guys please give me a link, instead of the generic “in most manufacturer websites” for an Anderson to 8mm adapter. I’m trying to use solar panels to charge this battery.
Originally reviewed on DOMETIC
August 21, 2020
Does it have a USB-C output?
Originally reviewed on DOMETIC