They are overkill for the SID cricket what you want are some Panasonic CGR or Panasonic PD's but for these devices you can use any IMR battery you do not want to use protected cells as they at times trip their internal chip and will not work the above will work great and they can also last if you decide to get into higher wattage devices the extra amps etc is fine I have a VTC5 ummm in custom 3-15watt mod works great awesome battery life sure they will work the LG HE 35a are cheaper... make senseI just got a new SID. And I use 2.5 coils. I also am looking for a good reliable and long lasting battery. Mrscareyz, would the batteries you recommend be good for this too?