Figure 10. Evolution of Acquisitions of Mobile Phones Units with Time
When the total number of equipment declared is considered, more than 95% of the units are in a hoarding position on the average. The average hoarding rate for replacement batteries is 62%. It demonstrates that individual batteries and packs are discarded with a higher rate than batteries of first purchase directly associated with the equipment.
A comparative evaluation of hoarding rates for equipment and replacement batteries is presented in Figure 11.
3.5. Elimination Modes
There are three major elimination modes for equipment and batteries (Figure 12):
1. the transfer to relatives, friends, the exchange (trade) or re-sale (in all cases the equipment is re-introduced as an acquisition),
2. the take back to a collection point (available for collection),
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