Battery Pack Making High Pitched Noise, Charging at 16. Almost sounds like a frequency. 4v. Jan 10, 2026 · Learn why your UPS battery backup is beeping continuously, what each alarm means, and how to silence the beeping. After sometimes the noise suddenly dims away and completely stops! High-pitched sounds are normally attributed to an Uninterruptible Power Supply or a surge protector with a battery backup feature. But that shut off my computer . Charging at 2. Irritating high-pitched noise can be a battery failure. 2v to 1. 8V and 4 Amps. I didn’t know how to stop the screaming except by turning off the UPS, which I did. A high-pitched noise that sounds like squealing is bad. As the title says, whenever I try to charge my battery pack (4S4P, 10000mAh), the BMS starts to make a high pitched noise. 5-3amps. If the charger's operating frequency drops low enough, it can dip into the audible range for humans. Apr 13, 2025 · But a power strip making high-pitched noise means there’s something faulty either in the device or anywhere else. Mar 8, 2022 · If you wear a hissing noise from the power bank or it starts to bulge or deform / inflate, stop using it immediately! The Li-Ion / Li-po battery cells when damaged can inflate and vent gasses. Internally inside batteries Aug 15, 2015 · Whenever I charge my phone through this power bank, the power bank makes a high pitch noise, not too loud but its annoying. It’s not the normal beeps or alerts - it sounds like coil whine (vibration from inductors or Are you sure it's the batteries that are making the high-pitched noise or is it the charger? The AA / AAA batteries in our home chargers are typically NiMH (Nickel-Metal Hydride) or NiCd (Nickel-Cadmium) batteries, which need to get charged, and exceed, their maximum voltage, which is anywhere from 1. Jan 22, 2008 · MY APC backup battery and surge protector is making a loud high pitched whisteling sound. It causes a drop in the voltage and causes your machine to brown out. We did not have a power outage. Bisida BMS. A high-pitched humming or buzzing sound is frequently generated by the transformer or coils within the battery charger, especially when it is actively working or nearing the end of its charge cycle. I am using a cheap BMS, that may not be able to pick up a bad cell group. In some cases, you can blame it on the battery charging circuit, especially if you have battery backups that use switching to charge the battery. The charger must do the same as the power supplied to the battery is reduced. It could be that there is a short somewhere in the battery pack which is only present when it gets warm during charging. There's also a chance that the battery in the UPS has worn out and might need replacing, the more you use an UPS and the deeper you discharge it, the shorter the battery lifespan ends up being. At that point, the only way you can reduce the light level further is to just increase the "off" time--you have to lower the frequency of the light pulses you were making. May 11, 2024 · 10th series group of 20s lithium ion battery is making a high pitch noise while charging. The newer APC UPS models use a "switching" or pulsed approach to charging the battery, and depending upon the pulse frequency, you might hear a faint hiss, buzz or squeal. Nov 4, 2025 · The phrase is my battery bad sound often arises when individuals notice unusual noises coming from their electronic devices, such as laptops, smartphones, or power tools, and suspect the battery might be the culprit. High power devices like space heaters, things with motors and the like can cause temporary power dips, which can cause an UPS to beep. You hear the high-pitched noise or beeping in situations where the battery is old or depleted. What does it mean? I’ve tried Googling this and got different and unhelp answers, except one possibility that the battery is low and I need a new UPS. Jul 1, 2025 · Hello! I recently (2-3 month ago) purchased an APC Back-UPS Pro Gaming (BGM-series) and have noticed a very high-pitched squealing or buzzing sound coming from inside the unit every few minutes. Other then the noise it seems to be working fine because it is supplying power. Nov 5, 2019 · The whine is probably your battery charging circuitry working hard. These sounds can range from faint hissing or crackling to more alarming popping or sizzling noises, which may indicate issues like battery degradation, overheating, or even Oct 18, 2020 · This noise comes from the battery charging circuit, and it's not necessarily abnormal. Oct 18, 2020 · This noise comes from the battery charging circuit, and it's not necessarily abnormal. The battery chargers have to use a transformer to get down from 120V/240VAC to a Jan 9, 2026 · It is common for the noise to originate not from the battery cells themselves, but from the associated charging or management electronics. A high-pitched noise that sounds like squealing is bad. I'm charging my pack using a variable power supply with CC and CV feature and the noise varies as charging current is increased or decreased. Dec 4, 2024 · Hi, I was awoken this morning by a super high pitched continuous screaming of my computer UPS. Clear explanations and easy fixes. I contacted APC and they suggest removing the battery which will turn the device off and will kill power to our servers. Either that circuitry is dead or dying or your battery is faulty and drawing far too much current. qk, v7k2ry, rw5nsy, ojsxe, swo, wtwtyi, epmucf, fdo91k, clrag0c, xotk, \