If it’s been a long time since you used the device, there’s a chance that the device’s battery has dropped below the minimum voltage level considered safe for repeatedly discharging the device’s battery to. That’s usually between 3v and 3.2v. Many electronic devices that have rechargeable lithium batteries have a safety feature that prevents them from being recharged if they are over discharged. Honestly speaking, however, it’s not that it’s bad to use the battery if it’s been over discharged, but rather that they need to be recharged slowly and gently if they are that low. If you have a way to slowly recharge the battery back up to around the 3v level, then your device should charge them fine from that point on. I always make sure to keep some TP4056 lithium battery charge protection modules so I can recharge low batteries in such situations because they are really good at charging even batteries that are down below the 1v level slowly enough to not hurt them up to about 2.5v roughly, at which point they’ll start charging a bit faster until they reach the optimal charging point of 4.2v. They’re really handy modules and are really, really cheap. I picked up 40 for $10, so we’re about 25¢ each at that point. I think that as long as your batteries have dipped into negative voltage levels, then they can be salvaged though they may take slight damage that would possibly shorten the life time but only by a few charge cycles. At several hundred charge cycles in, you wouldn’t even really notice the difference at that point unless you keep track of each time you charged them, which is unlikely. This all supposes that the charge state of your battery pack is indeed the problem, I could be wrong. If it’s not taking a charge, it’s either what I’ve said, or the lifespan of your batteries is up and they need replaced.
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If it’s been a long time since you used the device, there’s a chance that the device’s battery has dropped below the minimum voltage level considered safe for repeatedly discharging the device’s battery to. That’s usually between 3v and 3.2v. Many electronic devices that have rechargeable lithium batteries have a safety feature that prevents them from being recharged if they are over discharged. Honestly speaking, however, it’s not that it’s bad to use the battery if it’s been over discharged, but rather that they need to be recharged slowly and gently if they are that low. If you have a way to slowly recharge the battery back up to around the 3v level, then your device should charge them fine from that point on. I always make sure to keep some TP4056 lithium battery charge protection modules so I can recharge low batteries in such situations because they are really good at charging even batteries that are down below the 1v level slowly enough to not hurt them up to about 2.5v roughly, at which point they’ll start charging a bit faster until they reach the optimal charging point of 4.2v. They’re really handy modules and are really, really cheap. I picked up 40 for $10, so we’re about 25¢ each at that point. I think that as long as your batteries haven’t dipped into negative voltage levels, then they can be salvaged though they may take slight damage that would possibly shorten the life time but only by a few charge cycles. At several hundred charge cycles in, you wouldn’t even really notice the difference at that point unless you keep track of each time you charged them, which is unlikely. This all supposes that the charge state of your battery pack is indeed the problem, I could be wrong. If it’s not taking a charge, it’s either what I’ve said, or the lifespan of your batteries is up and they need replaced. Some brands add a mode for shipping a device, usually called “shipping mode” that limits any battery usage by the device to the bare minimum. If your device has such a mode, there might be a certain button sequence that when pressed will bring the device out of that mode, at which point you could charge it normally. Other times, a factory reset could clear any hiccups that might be preventing the device from charging. I had both of these situations happen more than once with Bose, but not yet with your device even though I also own the same one you have. Good luck, and if you need to find out how to do a reset or if the shipping mode thing applies, checking for a owner’s manual online is usually a good way to do that.
If it’s been a long time since you used the device, there’s a chance that the device’s battery has dropped below the minimum voltage level considered safe for repeatedly discharging the device’s battery to. That’s usually between 3v and 3.2v. Many electronic devices that have rechargeable lithium batteries have a safety feature that prevents them from being recharged if they are over discharged. Honestly speaking, however, it’s not that it’s bad to use the battery if it’s been over discharged, but rather that they need to be recharged slowly and gently if they are that low. If you have a way to slowly recharge the battery back up to around the 3v level, then your device should charge them fine from that point on. I always make sure to keep some TP4056 lithium battery charge protection modules so I can recharge low batteries in such situations because they are really good at charging even batteries that are down below the 1v level slowly enough to not hurt them up to about 2.5v roughly, at which point they’ll start charging a bit faster until they reach the optimal charging point of 4.2v. They’re really handy modules and are really, really cheap. I picked up 40 for $10, so we’re about 25¢ each at that point. I think that as long as your batteries have dipped into negative voltage levels, then they can be salvaged though they may take slight damage that would possibly shorten the life time but only by a few charge cycles. At several hundred charge cycles in, you wouldn’t even really notice the difference at that point unless you keep track of each time you charged them, which is unlikely. This all supposes that the charge state of your battery pack is indeed the problem, I could be wrong. If it’s not taking a charge, it’s either what I’ve said, or the lifespan of your batteries is up and they need replaced.