The disclosure relates to a portable terminal with a case and inside the case: an electronic or optoelectronic module for acquiring or processing information or data and a compartment for housing a battery pack, said battery pack configured to power said electronic or optoelectronic module. The portable terminal also includes: a cap for closing said compartment, said cap being movable between a closed position and an open position wherein said compartment is open to allow the insertion or extraction of said battery pack. The terminal also includes a locking/unlocking device configured to lock/unlock said cap from said case. The terminal also includes a holding device configured for holding said battery pack within said compartment, wherein said holding device can be deactivated when said cap is in said open position in order to allow said battery pack to be extracted from said compartment.