REYTRIC Upgrade 2-Pack 2500mAh X4 Replacement Batteries for Insta360 X4 Action Camera and 2-Channel Fast Charger Case Compatible with Insta360 X4 Battery, Charger Case Can Store Misro SD Card

Works great with my x4. Didn’t measure battery life but no complaints using it. Great backup battery for longer recording days.

The REYTRIC Upgrade 2-Pack 2500mAh X4 Replacement Batteries for Insta360 X4 appears to work as well as many of the other aftermarket insta360 X4 batteries on the market. On average it got about 5 minutes less runtime than an OEM battery. In all of my tests, it never ran for 75 minutes when shooting in 8K.

I got this for extra batteries and charger. The camera let's me know it is not an original battery but they do work fine.

Update - seller offered solution in the form of refund. Pretty good and prompt response from the seller on the issue.The batteries seem OK. Maybe not perfect as I have received a few concerning error messages on the camera about possible battery faults only with these batteries. Despite the messages, they do continue to work.The charger however does not work any longer. It’s completely failed after just under a month. When plugged in, the red light faintly flashes and it seems to buzz or click intermittently, but it does not charge. I’m now afraid to connect it to power in case it damages the batteries.I’m also on an extended trip with it, so no way to return or replace. It’s now dead weight to carry in a backpack if I decide to warranty when I eventually return, so I’m not certain if I’ll be able to update this review with news about warranty service.

The x4 boasts impressive water performance SO LONG AS IT IS FULLY SEALED (no red visible when battery inserted) well these batteries said they were for the insta360 x4 and I made sure it snapped into place - no red visible, it almost instantly powered off when entering surface level water, I took the battery out and so much water poured out from inside.. so thank you.So… Thank you for breaking a near $500 camera and ruining my SD card with all the previous footage I had…

good value and product is good as described

Good solid alternative batteries to the OEM. Function and fit is identical. (Not tested in water). Runtime seems as good, maybe slightly less then OEM. I took these on a vacation and though didn't run them to full use I did cycle them in and out alongside the factory battery and the remaining time was in range across all three batteries. Heavy 8K use. Some heat generation as expected running 8K. The charger made for an excellent travel case for the batteries. Drop in a bag loose and not worry about the batteries getting banged around or the like. All in, good solid option at value over OEM.

When I selected this item the description has in it "2-Channel Fast Charger Case" I took this to mean that the case has a battery in it and can charge or top off the two batteries when inserted in it like some cases I have for my older X3 which have come in very handy when hiking and on dive boats.In this instance the "2-Channel Fast Charger Case" just means you can use the case like a charging HUB to charge your batteries from a power source.The batteries are 2500mAh and work just as well as my OEM batteries on my X4, however I am disappointed that maybe I did not understand their usage of the fast charger case.