While Motorola did announce a compelling range of new smartphones a couple of weeks ago, there was one notable absence from their event: the launch of a second generation Moto 360. The good news is that a follow-up to Motorola's attractive Android Wear smartwatch is on the way, and thanks to Brazilian telecoms agency Anatel, some details about the watch have appeared online.

Anatel is essentially the Brazilian equivalent of the FCC, and recently two different Moto 360 models were submitted for testing: the '360S' and the '360L'. This indicates the Moto 360 will come in two sizes, similar to how the Apple Watch is available in 42mm and 38mm variants.

Unfortunately Anatel's documentation doesn't reveal any further details about the upcoming Moto 360 refresh, apart from battery capacities. The 360S will reportedly feature a 270 mAh cell, while the larger 360L gets a 375 mAh cell.

The design of the second-generation Moto 360 is expected to be similar to the original model, albeit with a few tweaks and refinements. A video posted by Motorola's Twitter account last week, before it was swiftly removed, appeared to show a render of the second-gen Moto 360 with a revised strap connector and a new position for the watch's only button.

For those that were hoping Motorola would use a fully-circular display rather than a 'flat-tire' design like in the original Moto 360, prepare for disappointment as Motorola's video still shows a cut-off display. There's a chance that this isn't a final design, though, so we'll just have to wait for an official announcement to see what the new Moto 360 really looks like.