When discarding a battery pack, contact your local waste disposal provider regarding local restrictions on the disposal or recycling of batteries.
You can check for available specific instructions for your country by going to HP's Product return & recycling webpage, selecting your country from the dropdown menu and checking if "Batteries from notebooks and smartphones" option is available there.
In the US and Canada, HP has contracted with RBRC to provides over 32,000 retail drop-off locations for rechargeable batteries. RBRC accepts the following types of batteries: lithium ion (Li-ion), nickel metal hydride (NiMH), nickel cadmium (Ni-Cd), and sealed lead acid batteries under 2 pounds.
To find a drop off location or support contact details, go to https://www.call2recycle.org/
If there is no retail location near you, contact your local waste disposal provider regarding local restrictions on the disposal or recycling of batteries.