At all always, at first sight cheap, that is actually. If this varta costs in 3-4 times more cheaply Duracell, but serves, conditionally speaking, in 6 times it is less, it turns out "cheap" varta twice more expensively Duracell. And it only under a condition if to compare purchase varta by the gross, a box, and Duracell - by the piece till 45-50 the river And so a box and Duracell manages roubles till 30-35, if not more cheaply.
And still it is necessary to look at what time batteries in a tonometer suffice. If the set suffices for a year, you the whole box for the future?
And if for you the total of 300-500 roubles burdensome enough (situations in life different happen) to pull out from the budget on batteries on 60 roubles even monthly (and I doubt that batteries in a tonometer suffice all for a month) will be less painful, rather than to pull out at once 300 rivers, but time in half a year.
- it is necessary to look at the fake account, where offer. If anybody and to call him in any way what for to risk? As it is known - greed ruined.