Creating a solar powered clock

Im currently trying to make a solar powered watch the size of a gauntlet. at max i want to use 2 AAA batteries. The biggest problem i have right now is how do solar panel recharging work and what not. I know and fully understand the straight through setups with a simple diode to avoid the battery bleeding at night. and for power to go from the panels to the batteries the voltage has to be higher then the batteries voltage. but how do i make the battery recharge higher then the clock drainage on the battery and avoid extreme over charging where 1. i kill the batteries 2. avoid having the users arm blow off. i was thinking of making a bleed off where if the battery reaches a certian voltage the power is drained a little. Iv also heard from some that a small solar panel can recharge a battery but would never damage it cause it only only charge at 12 hours max and with the clock the drainage will be enough. does any one else have more information on this. like how do i obtain high enough voltage to recharge a battery but very very slowly. thanks