Here’s a cool tip that’s not well publicized: the power adapter you use to charge your iPad will actually charge your iPhone roughly twice as fast as the tiny power adapter that came with your iPhone.

The iPhone power adapter is only 5 watts, but the iPad power adapter is a whopping 12 watts. If you’re in the market for a new power adapter, purchasing the 12 watt iPad adapter is a no brainer, seeing as it only costs $2-$3 more than the less powerful 5 watt iPhone adapter.

If you’re just looking to boost your charging speed, pick up a 12 watt adapter today.

Buy 12 watt adapter

Notably, the reverse is also true: if you charge your iPad with the 5 watt iPhone power adapter it will charge half as fast as it would using the more powerful adapter that came with your iPad at the time of purchase.