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You can buy the same for about $ 1 http://www.batteryjunction.com/titanium-keylight.html?gclid=CjwKEAiAkuLDBRCRguCgvITww0YSJAAHrpf-sa0LNczdbe41MC17z7VdyEeawZBNfNB6Mz9XmkzDNRoCdZrw_wcB
We lived in Pakistan for 8 years. A desert cooler -- AKA swamp cooler --- works great in the 110 degree dry months. The humidity is much needed. No AC is runing. Then the monsoons come in July. Desert cooler is worthless because the air is nearly saturated with water--high humidity. AC works great.A major concern for the desert cooler it to keep it automatically filled with water. So a float valve -- like in toilet tank --- is used..
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