00:00Have you ever had this happen? You leave your cordless drill battery and use for a long time,
00:06fully drained, without charging it. Then one day, when you finally need it, you plug it in and
00:12nothing happens. No charging at all. Most people immediately think, the battery is dead. Time to
00:19throw it away. But in many cases, the battery isn't actually dead. It's just gone into a deep sleep.
00:26In this video, I'll show you a simple and practical way to fix this issue,
00:31saving you from buying new battery. So if this sounds familiar, let's get started.
00:37I know you probably wouldn't believe it right away. So the first thing I decided to do was plug
00:41it into the charger and give it a try. As you can see, the indicator light on the charger doesn't
00:49change color at all, which means a battery isn't accepting a charge. And if you're still not fully
00:54convinced at this point, I'll check it right now with a voltage meter, so you can see for yourself.
01:12As you just saw, this time I couldn't measure any voltage at all left inside the battery.
01:18And to avoid any suspicion of swapping parts, I'll mark this battery right here.
01:30First, we're going to remove the cover of this charger to take a closer look and find out what's
01:36really causing the problem. There's one very common issue that many people tend to overlook,
01:41dirty contact slots on the battery's positive and negative terminals. It may sound simple,
01:47but it's actually a serious problem. After long-term use, dust and dirt build up,
01:54weakening the contact and preventing proper charging. So if you notice any dirt in those slots,
01:59clean them right away. Don't let it slide.
02:02It's not really a surprise, considering this is a charger I've been using for a long time.
02:26As soon as I open it up, you could already see some dust inside,
02:30but that's actually a good thing. It gives me a perfect chance to show you the proper way to
02:35clean it.
02:36After brushing off the loose dust with a paintbrush, I'll clean it more thoroughly using a multi-purpose oil
03:04and a cotton swab. This type of oil doesn't just remove built-up dirt and residue.
03:10It also displaces moisture and helps prevent oxidation,
03:14improving the electrical contact and charging stability.
03:16So,
03:34To clean
04:04Deeply built up rust on the positive and negative contact slots
04:07You should use fine grit sandpaper to remove it thoroughly
04:11This helps restore proper contact
04:13And noticeably improves charging performance
04:34Once everything is cleaned up, we'll move straight on to the next repair step
04:39In my hand, I have a box full of butterfly clips
05:03They may look simple, but these small tools are extremely useful for repairs and DIY work
05:10From holding parts in place to quick temporary fixes
05:13Butterfly clips always come in handy when you need them
05:17Next, I prepare two electrical wires to temporarily link the power source to this battery
05:23The goal here isn't a complex repair
05:25But simply to reactivate the internal circuit
05:28Especially if it has shut down after sitting in use for a long time
05:32Alright, now let's put everything back together following my instructions
05:52So
06:22for those who may not know these are two alligator clips they're designed to quickly
06:37clamp onto electrical contact points creating a secure temporary connection without soldering
06:43or screws because they're simple and flexible to use alligator clips are commonly used for testing
06:50measuring and quick electrical checks in repair and DIY work
07:20so
07:24you
07:26you
07:28you
07:31All right.
08:01I have a small note for you.
08:27Once the connection is made, check the battery every 15 seconds or so to see if it's starting to recover.
08:35Doing it this way is much safer, allowing you to stay in control and avoid any unexpected issues.
08:41By the second check, I'm fairly confident it should be working now.
08:58The only question is whether the result, once we check it again in a moment, will turn out exactly as expected.
09:28And now, you can see the result for yourself.
09:35A battery that seemed completely dead, no charging, no voltage, no response, can actually be brought back, as long as we understand the problem and handle it the right way.
09:46What I want to share in this video isn't just a battery fix, but a way of thinking when it comes to broken tools and equipment.
09:53So many things get thrown away not because they're truly beyond repair, but because they were never properly checked or given a fair chance.
10:01A bit of dust on the contacts, some oxidation, or a protection circuit that's gone dormant after sitting in use for too long.
10:09Any of these can stop a battery from charging.
10:12And these are exactly the kinds of small issues that most people tend to overlook.
10:17Now, to be clear, not every battery can be saved.
10:21If the cells are badly worn, damaged, or the internal circuitry is truly faulty, then replacing the battery is the right call.
10:28But before reaching that conclusion, I always believe it's worth checking the simple, common causes first.
10:35At the very least, you'll understand what's really going on with your equipment.
10:39And more importantly, you won't be throwing away something that still has life left in it.
10:44If this video helped you, or if you've dealt with similar issues, whether it's drill batteries, power tool packs, or other devices, feel free to share your experience in the comments below.
10:56Your story might help someone else facing the same problem.
10:59Don't forget to hit the like button if this video saved you time, money, or gave you a bit of practical know-how.
11:05And if you're interested in repair tips, DIY projects, and simple technical solutions that actually work, consider subscribing so you won't miss future videos.
11:15Thanks for watching all the way to the end.
11:18Take care of your tools.
11:20Fix what you can, and always check before you throw things away.
11:24I'll see you in the next video.
11:25I'll see you in the next video.
11:26I'll see you in the next video.
11:55I'll see you in the next video.
12:25I'll see you in the next video.
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