Consumers firm strongly echoes "Button batteries" the risks and precautions.

Button batteries shapes are coin-sized battery, install it in a variety of devices, including remote controls, singing Christmas cards, bathroom scales and car keys, watches and LED products and so on.

"When Button batteries come into contact with body fluids, it creates an electric current if swallowed or ingested these batteries can cause burns and tissue damage in just two hours," This is a little-known threat, in our homes, you can cause serious and sometimes permanent damage, require multiple painful surgeries. In some cases, it can prove to be fatal.

Overseas evidence suggests, Button batteries is an emerging risk, because they found an increase in equipment and new types of lithium-ion batteries are more powerful range. In the United States last year, more than 19 children suffering from life-threatening or debilitating injury. Injury cases in New Zealand has at least four known, although less serious incidents are likely to be underestimated.

The elderly may also be at risk, according to foreign reports Button batteries-use of hearing aids - to be mistaken for pills and tablets.

Mr Rushton said the ministry is working with the United States, Australia, Japan and South Korean counterparts to work, look at the long-term Button batteries can reduce the risks.

"However, many batteries and equipment already in circulation, the best way is to remind parents and other caregivers risks.

He said: "We urge parents to check your home, car, and any other place where your child may contain Button batteries gadgets. Ensure that these batteries are safe equipment, and keep key lock up any spare batteries.

If you suspect your child has swallowed or ingested batteries, take them to the hospital immediately. Do not let your child eat or drink anything, do not try to induce vomiting.