Genial small and cheap, not particularly durable

I bought this tail light in recent years determined a half dozen times, because it is so incredibly small, cheap and also very bright. Low mass and weight make it ideal to take away and the special Lady batteries are not an obstacle, because they / piece is available online from 60 cents. The theft risk is negligible because of the low price and not least because of unobtrusiveness.

Unfortunately, the light was worn regularly: total failure, loose connection or discharge of the batteries in the off state.
Once a year I had my fallen yet, but the last two copies were unusable after only a few months.

Therefore, I am now switched perforce on a competing product, although this is relatively expensive and I do not really too big and heavy. SIGMA offer would be taillight in better quality for a reasonable price, I would go back immediately!