Glorified kitchen timer - suggestions please

[suealpha]

I have just - yet again - retrieved disastrously burnt food from my ancient Aga. Wasted food, nasty cleaning job :(

I also frequently set the battery charger for - typically 16 hours - and then forget to switch it off at the due time.

I often (though not invariably) set a kitchen timer and put a little note to myself explaining what the pinger relates to, but there are several defects in this procedure (apart from my imperfect implementation of it at all):

You really need several timers on the go. I have two but that's not enough.
In a big house it's easy to be out of earshot at the crucial time. (I do sometimes carry the timer with me, but also carrying round an explanation of what it's all about makes things more fiddly.)

I have a feeling that some people use a smart phone in some way for this job. I haven't got one of those and think this isn't a good enough reason to get one! I do have an iPad, but that's a big thing to carry around the house wherever I go!

Does a gadget exist that would help me?

clip on timer?

I must admit I do use my smart phone for this purpose but then I have an unhealthy attachment to the thing...

Since posting I've done a bit more googling and found that (at a price) you can buy timers that let you time two or even three separate things, e.g., this one www.amazon.co.uk/Maverick-Professional-Digital-3-Line-Timer/dp/B00OVM17KA/ref=pd_sim_sbs_201_5?ie=UTF8&dpID=419zSo0NNOL&dpSrc=sims&preST=AC_UL160_SR111%2C160&refRID=1V5P3DDT50WV06MQS6A3
I thought that if I found the right stationery item - a little notepad or some post-it notes, say - anything rather than a haphazard scrap of paper, and something small to put timer and said stationery item in, if I could get these details just right I might be able to put together my own gadget.

But if anyone is aware of the existence of what I'm looking for ready made, please say. Thanks for your posting, BTW, IsaBisaBuildsaBoat. I don't share your unhealthy attachment, but I've plenty of my own!