Yes, you can,  you can unload the bobbin (pill) when you want to use manual or oral tube to inflatable ,of course you also can upload when need. 

No, that is not possible. Different cartridge have different volume so that produce different buoyancy, usually , 33 gram/150N , 24 gram/110N ,17 gram/75N , it’s very important to find fitted cartridge.

No. It can however inflate prematurely if the lifejacket has been exposed to high humidity over a lengthy period of time. Then it can happen that the lifejacket inflates on a beautiful summer's day. The way around this:after heavy rain or after a sailing trip, replace the tablet in the inflation device.

We would strongly advise against doing so. This has to do with the circumference of a child's neck. If a child wears an adult's lifejacket, the child will slip down inside the buoyancy chamber. The child's head will not be far enough above the surface of the water.

Several possibilities:
While sailing: Ready for use, or even better, always on the man/woman. A lot of accidents happen when peeing.
After sailing: dry, in the dark and not too warm or too cold.

The average life time is 10 years.

Servicing is tremendously important. Through this servicing and care, the lifetime of the lifejacket will be prolonged and the safety of the product increased. There are gaskets in the inflation device which have to be renewed. These age too. The triggering forces have to be tested. The cartridges are tested for hairline cracks. The buoyancy chamber is checked for airtightness and damage. The seams undergo a check.

If you use a lifejacket which is that old, you must always be aware of the possibility of failure of the inflation device or bursting of the buoyancy chamber due to OLD AGE. For safety reasons, we must suggest that you replace your lifejacket.

A Newton is a unit in which buoyancy is measured.150 N (Newton) is approx 15 kg or approx 15 Liter.

In most cases, the view is that a crotch strap is there to prevent a lifejacket riding up on the body. This is true as far as inherent buoyancy lifejackets are concerned because the buoyancy is already there when the person who has an accident falls into the water. In the case of inflatable lifejackets this is not so. Here the crotch strap serves merely to improve your body position in the water i.e. you can adjust the inflatable lifejacket afterwards. For this reason, we have decided on crotch straps as optional extras.  

If your cat is prepared to wear one, then a vest like that may be quite helpful. Our dogs' vests were designed so that dogs, but cats too, could be grabbed hold of IN the water. To pick them up by their fur would be fairly impossible.

Sometimes a lesser quantity is better. One D-Ring gives additional safety because you are always secured when you hook on to this one ring. With two-ring systems there is a danger that in the heat of the moment one only hooks on to one ring and the system is then dysfunctional because it is not using its total strength. With SECUMAR, the single D-Ring and the central anchor buckle are to be viewed as a unit which provide the necessary strength.