good 9V battery

[teddychn]

this might be of interest:

I'm really intrested in this kind of Lithium rechargeable battery. Although just about all of them asserted "low self-discharging",
but I have been hesitating to buy one. Becasue considering the boost converter's idle current could be more than 50uA. One
still need to tacke care of over-dischaging situation. Unless the battery management circuitry are included.

Is there anyone has one and knows the ball-park of self discharge time.