According to reports, at least 10 Hezbollah operatives were injured after the hand-held communications devices they held blew up in Dahieh, Beirut • Similiar incidents reported throughout country
Iran's Ambassador to Lebanon Loses One Eye, Seriously Damages Other in Pager Explosion, New York Times
Mojtaba Amani, according to the publication, is being evacuated to Iran for treatment. It is noted that before the explosion, the pagers emitted a beep, which prompted many to bring the devices to their faces.
The attack was probably carried out by Israeli intelligence services, which planted explosives in about 5,000 pagers, Reuters reports. Of these, about 3,000 exploded. A senior source in Lebanon told the agency that the devices were planted by the Israeli spy service "at the production level." "The Mossad inserted a circuit board containing explosive material into the device, which receives a code. It is very difficult to detect by any means. Even with any device or scanner," the source said.
The day before, 4,000 people were injured in Lebanon, 11 of whom were killed as a result of pager explosions. Reuters writes that hundreds of members of the Lebanese armed group Hezbollah, including fighters and medics, were seriously injured due to explosions of pagers, which they use for secret communication.
I'm kind of guessing, from the strength of the explosion in the video -- it really was a small explosion, not bursting into flames -- that somehow rigged pagers were inserted into Hezbollah's equipment prior to distribution to operatives.
But if this was, instead, some kind of remote software compromise of battery management system firmware for lithium batteries, now I have one more thing to worry about in my life, with all the devices with lithium batteries I have.
looks warily at laptop on my chest
EDIT: Strengthening my concerns, in the CNN article I linked to in my other comment, the devices were termed "hacked" by Lebanese internal security forces. Now, okay, that's a report immediately after the event, and I don't know how much time they have had to actually do analysis. Or if they're right. But:
NNA reported that “hacked” pager devices exploded in the towns of Ali Al-Nahri and Riyaq in Lebanon’s central Beqaa valley, resulting in a significant number of injuries. The locations are Hezbollah strongholds.
...it sure doesn't assuage my concerns at all. Even if you couldn't make a BMS discharge lithium batteries hard enough to explode, you definitely can make them do so hard enough to make a pretty unpleasant fire. You do that with numerous laptop-sized devices all over a country, that'd potentially be a pretty unpleasant event.
sighs
Maybe it's possible to mandate that lithium-ion devices conforming to some sort of safety certification standard, like UL or something, have non-updatable-firmware hardware putting a physical limit on discharge rate. I don't think that that'd add too much cost or too many restrictions to devices.
EDIT2: From this YouTube video, it sounds like as long as you're not using sketchy battery cells in the device you're building, that battery manufacturers already take this into consideration via a blowout hole:
Even in the event of a short circuit, genuine lithium-ion batteries have several protective measures to prevent them from catching on fire. Take a look at this lithium-ion that was just shorted out. In the unlikely case that a battery short-circuits, the terminals heat up and the electrolyte fluid begins to boil. The vent holes in the top of the terminal allow the battery to depressurize the electrolyte steam, thereby reducing the battery capacity and making a pressure explosion much less likely. In the end, you're more-likely to see a small fire shoot out of a battery than a large explosion. While they still can cause damage, it's a much better option than having a battery explode, which results in a shrapnel cloud. But in counterfeit batteries, this vent hole safety valve is often ineffective.
All that being said, I wouldn't be surprised if I have some devices with sketchy cells...but my guess is that at least in my collection, when it comes to large-battery-capacity, Internet-connected devices capable of firmware updates, stuff like laptops, they're probably -- hopefully -- using legit battery cells.
I don't believe small lithium batteries can explode like that. Not even big car batteries explode like that. They make a big fire but not this kind of explosion.
Either explosives were implanted somehow by IDF in the supply chain, or Hezbollah is crazy enough to put explosives there, just in case the devices fall in enemy hands, and IDF learned that and trigger the explosions remotely.
Supply chain makes the most sense. It’s not like pagers are used super commonly and I doubt they have good margins. Would be pretty easy to sneak something in.
The scary thing about a supply chain attack is that Hezbollah aren't idiots. This is basically like buying a "burner phone" (that name will now have different connotations now).
In the movies, people buying burner phones go to a random corner store and buy a random phone off the shelf. That way, even if they're under surveillance, the cops / CIA / FBI can't pre-bug the phone because they don't know which corner store the person's going to go to, let alone which phone they'll pick off the shelf.
If you're an armed group in Israel's crosshairs, you're going to take similar precautions when buying thousands of pagers. The safe way to do it would be to slowly and unpredictably get a small sample of ones that are being sold to the general public. If this is true, it could mean that there are tens of thousands of pagers out there that contain explosives that were merely sold as "decoys" in order to try to make Hezbollah feel safe in buying them. In other words, there may be tens of thousands of explosives in pagers that weren't activated because they weren't in the hands of Hezbollah when Israel decided to hit the button.
The cells cannot themselves have current regulation sufficient to avoid a fire or explosion. My vague understanding from past reading is that typically, if you buy an 18650, it'll have internal regulation, but not all do -- it adds to the cost and reduces capacity. But you'd only want an unregulated 18650 if you were putting it in a device that you would trust to regulate the thing. I believe I was reading about it in the past in the context of high-end flashlights that took removable 18650s, was telling people not to try and use unregulated 18650s, as then you're trusting the flashlight's firmware to properly limit the discharge rate.
The battery would have to be the first point to go if the external BMS circuitry just let the thing discharge as quickly as possible. Like, if you had small-enough connections or something, I'd imagine that they'd melt first, act like a fuse.
From the video I read above, lithium batteries from reputable manufacturers tend to have blowout holes to prevent exactly this -- if the electrolyte starts to boil, then they'll start venting vapor. They may catch fire from the heat, but it should prevent the pressure buildup from reaching the point where the battery explodes. They say that counterfeit cells may not have vents that work correctly.
So I can believe that there are devices out there at risk. But I would guess that most devices probably aren't. That is, you could maybe make devices catch fire, and that could be bad if done at mass scale at the same time, but probably most wouldn't explode.
Even on that above 18650 that exploded, you could see vapor coming out prior to the explosion. According to that video I linked above about exploding lithium batteries, it sounds like the issue is more that on some counterfeits, the pressure release system doesn't work properly rather than that it doesn't exist at all -- I didn't quote the text, but they went more into depth on it after the bit I quoted. But I suppose that if there were no presssure release at all, that it could probably get more pressure buildup before exploding.
Israeli secret services used exploding phone previously, it's not a stretch to assume that they tapped into supply chain of pagers and brought a pallet of pagers with a low tens of grams sized bomb inside
I wonder whether they exploded exactly at the same time. If so, it seems less likely it would have been an attack via the batteries since you wouldn't expect them all to heat up and explode at the exact same rate.
I read somewhere that Hezbollah started using pagers as their main method of communication instead of cell phones out of worry that phones would get hacked. That'd explain the prevalence of the pagers.
Also, how many pagers are still out there with explosives in them?
Option 1: Israel blew up all the pagers containing explosives, regardless of whether they'd been sold / passed on to family members, friends, or other people who had no connection with Hezbollah, so many of the thousands of injured were innocent bystanders.
Option 2: Israel got the pagers into the hands of tens of thousands of people, then only blew up the ones that were actually in Hezbollah possession, leaving thousands of pagers out there containing explosives.
these pagers were issued by hezbollah higher-ups, for one-way communication with their hq. there's little reason for them to sell them or even lend to family because you can't call from this thing or communicate with it any other way because it's receive only. civilian casualties are probably low for this reason