If it's 4+ months, I think the rule-of-thumb for li-on batteries is half-charged, and I would pull those batteries. I would pull the rechargeables/coin batts completely.
Having shipped hpcs overseas multiple times; bubble-wrap
(or original packaging + bubble wrap
) and small boxes, not larger than a case-'o-beer box worked for me. Keeping all together, excluding anything not HPC-related. As for peripherals, bubble wrap also works, and for small peripherals, I've used Altoids tin cans lined with bubble wrap.
Can you tell I've done this before
Since unpacking them might take months after arrival, I would label all the cords
(actual labels taped to said cords
); you'd be surprised at what you forget. Since the tips matched, I once plugged in an external battery charger cord into my HP Shift x9500 and blew out the device, something I'm still not quite over. Since rubberbands rot, I would bind cables with twisties.
Jake