TechBits: preventing child car deaths (07.02.14)

New devices on the market can help prevent child deaths in cars in summer heat. {}Many employ receivers that sound an alarm when parents get too far away from the vehicle. {}Some also keep the receiver from sounding when a child is not in their car seat. {}This is done through use of a pressure pad placed under the seat.The devices have some shortcomings. {}Batteries can get low- and the alerts can be hard to hear in noisy environments. {}They are not intended as any kind of substitute for good, attentive parenting- but they can be an effective backup, as even the most attentive parents can make mistakes.