You can double the Apple Watch’s battery life, but it won’t come cheap

If the Apple Watch‘s purported one-day charge cycle doesn’t get your juices flowing then you’re in luck – a third-party company has designed a band accessory to top up the battery life.

Called the ‘Reserve Strap’, the band will attach to the Apple Watch just like any other strap. Unlike other straps, however, this one contains a built-in battery module.

Unfortunately, it’s available for pre-order at a staggering $249 (£165), which just $100 shy of the Apple Watch Sport’s RRP.

While it’s still in early prototyping phase for now, the Reserve Strap is a good sign of things to come.

An ecosystem of third-party products that can attach to the Apple Watch in the form of straps will undoubtedly boost Apple’s wearable sales.

What’s more, it’s likely to assuage the concerns of many consumers worried about the somewhat underwhelming battery life we’re expecting from the upcoming Apple Watch.

“The band will have embedded batteries and utilise magnetic inductive charging similar to the new MagSafe wall charger for the Apple Watch,” explains the Reserve Strap website.

“We don’t have hard numbers yet but based on current testing projections, we believe we will be able to increase the battery life of the Apple Watch by up to 125 per cent.”

Related: iPhone 6S release date

If the strap doesn’t float your boat, you’ll be glad to hear Apple is planning to offer a ‘Power Reserve’ mode on its fledgling wearable to extend battery life. This reserve option means your Apple Watch will only display the time.

The Apple Watch is set to be fully unveiled later today, although it won’t actually launch until next month.

The cheapest ‘Sport’ model will price at $349 (£230), while the most expensive Apple Watch Edition model is estimated to cost anywhere between $5,000 (£3,300) and $20,000 (£13,240).

Unlike other sites, we thoroughly review everything we recommend, using industry standard tests to evaluate products. We’ll always tell you what we find. We may get a commission if you buy via our price links. Tell us what you think – email the Editor