To power iPad back to on, press the Top button and continue holding the button until it shows Apple logo in the middle of the display. This may take few seconds to completely shut it off. When "slide to power off" appears on the top of the screen, release the button(s) and swipe the red power icon to the right to turn off iPad.
Press and hold down the Top button if you're using an iPad with a Home button, or press both the either Volume button and Top button and keep holding the buttons if you're using an iPad without a Home button.
Even if you do not understand what prevents iPad from charging fast, most of software glitches can be resolved by simply restarting your iPad. Now, it's time to rule out the software issue rendering that iPad charges very slowly or won't take a charge at all. Remember to use the charging cable and charger that came with the iPad. To speed up iPad charging, your best bet is to plug the tablet into a wall power outlet. This usually happens in some old PCs that fail to supply sufficient juice to charge up an iPad. Sometimes, you'll notice that iPad charges so slow but dies so fast when plugged into computer. When charging iPad through computer, ensure that the machine is on and not in sleep mode, and the tablet is plugged into the USB 2.0 or 3.0 port instead of the USB ports on keyboard. into the same outlet and verify if the device charges with added battery percentage.
To confirm if the power source is delivering power to charge an iPad, plug another device like iPhone, Android phone, etc. Then, charge your iPad again by hooking it up to a wall power outlet and it should now fix the issue. If you see any dirt, turn off your iPad and clean the charging port using a can of compressed air or a soft and dry toothbrush. So, have a look on the charging port under bright light. The debris piled up inside the charging port could also lead to that your iPad takes forever to charge, charges intermittently (on and off) or doesn't charge at all. To output high amperage to juice up iPad (mini, Air, Pro) quickly, it's required to use its included 10W, 12W, 18W or 20W charging adapter during the charging process. This is because most iPhones are come with a 5-watt adapter, which is only half of power of the iPad charging adapter. Some users complain that iPad is slow to charge when using an iPhone charger. Then, use them to firmly connect iPad to power source and let it charge for at least half an hour. If there are no signs of excessive wear, try a different known good charging cable and adapter that are shipped with Mfi certification. A charging cable or adapter that's not working will cause iPad to take a long time to charge. Next, inspect the charging cable and adapter carefully to see if there's any visible damage, such as cracking and tears.
A licensed third-party accessory will have an MFi (Made for iPod/ iPhone/ iPad) logo on the package. Make sure that you're charging your iPad through an Apple official charging cable and power adapter. See what to do if your iPad is not charging or show up alert messages. Note: This article focuses on handling the slow-charging battery to make iPad charge faster. What to do when if your iPad is charging slowly You can jump here to use a tool to fix the problem quickly. To fix iPad charging slowly, just follow the listed solutions for all old and new iPad models below. In other cases, the iPad slow charging issue could be the result of crashed software or hardware. More often than not, what causes an iPad to charge slow could be a faulty USB cable or adapter, a damaged charging port in iPad, or a deficient power outlet. Take hours to charge iPad (mini, Air, Pro) only to have the battery level go up to 20%? You unplug then plug iPad into a solid power source firmly using Apple USB cable and power adapter, but, still, iPad charges slowly, with battery taking 24 hours or forever to charge fully to 100%? We know, the slow-charging iPad is driving you mad, but why is it take so long to charge?