The batteries still have to packed according to IATA rules, and there are quantities limited for devices shipped in bulk.
BTW, the article gives the secret for shipping Li-ion batteries:Do not charge them! Only those with a near-full charge have the power to explode and cause firesl Besides, when they are installed in a device, there is little likelihood of them getting against something and shorting (and causing a fire).
Shipping them fully-charged -- in bulk -- is invitation to disaster!
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Apple rcently shipped to me (@ no charge) a replacement for the three-year old battery in my MacBook Pro. The instructions included, "Charge fully before using..."