The DR-E18 is a "dummy" battery that plugs into a transformer connected to wall power (called "mains power" in some countries) and fits into the battery slot in cameras that use the LP-E17 battery.
If your camera thinks the third party battery is a DR-E18 it won't provide recharge information because it thinks the device is powered by a wall outlet.
As to whether you can use third party batteries with your Cano EOS camera: You can. If you want optimal results similar to Canon branded batteries, use third party batteries from reputable brands and buy them from reputable sellers. The latter advice is also true if you choose to use genuine Canon batteries. There are many counterfeit "Canon" batteries in the marketplace. Only buy Canon batteries from authorized Canon dealers or you're probably being sold fakes.
For more about whether to use third party batteries or not, please see:
Should I buy an original manufacturer battery, or is a generic brand OK?
I've had very good luck with third party brands such as Maximal Power (only officially available through amazon, though counterfeit Maximal Power batteries seem to now infiltrate amazon via marketplace sellers that submit items comingled with amazon's own inventory), Sterling Tek, Pawa (sold by B&H in the U.S.), and Watson. No quality third party battery seller will try to pass off their products as genuine Canon batteries. They'll put their own brand name on them.