Replacement batteries for ph tester

[KLKelly]

I bought this a number of months ago and used it once.  I forgot the pen on and the batteries died.  If I bought the batteries from a store I expect they'll cost more than the $40 I paid for the pen.

Where do you guys buy replacement batteries?

[garnpet]

What type of batteries?

[fischkopp]

My pH tester uses those little coin cells: LR44. I got a pack of 10 @ Dollarama

[KLKelly]

Coool! Thanks