IIRC from when I looked at LiThyCl batteries for metering and other apps a fair time back -/12? I believe Panasonic was another brand that came up. Haven&#;t looked lately to see if still doing these. This battery class is great for long standby apps where device in a deep sleep mode sipping gently and occasionally (heartbeat?) and where ultimately internal self discharge is the key issue/dominating factor&#;leaving charge available to be sipped gently or not at all until really needed far in the future. Again IIRC these where good for 15-20 years and potentially as long as 25 years. Problem was if used for a radio txt is the peak current can run to mA&#;s even many 100&#;s/100&#;s mA and this quickly &#;fatigues&#; the battery & exhausts the chemistry and if tx period too often then there is insufficient recovery time leaving battery to deliver just a fraction of the advertised capacity :-(. The solution as Al suggests is to add a large cap to buffer&#;I would suggest a short c.r.c network to smooth out current pull not just a bulk capacitor. To that end large in this context should be thought of as e.g. a Supercap. Indeed I believe Tadiran whom you have already called out also offer batteries with SC&#;s built in. Such products can get chuffing expensive so be sure of real need and analyse performance carefully. Again from looking at a different requirement/project around /15 it was realised that the peak pull and duty cycle was too high to benefit from the low internal discharge rate as the system would exhaust long before the life benefit of LIThyCl could be realised so paying over the odds for a theoretical benefit didn&#;t make sense&#;do a lifecycle cost benefit analysis and compare to other battery techs along side any duty cycle analysis.
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