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Almost tripled my flight time
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<blockquote data-quote="rangemaster728" data-source="post: 106613" data-attributes="member: 4458"><p>There are two versions of the Smatree SP90.</p><p></p><p>Early version (v1)is charged by a micro-USB port:</p><p>[ATTACH=full]12056[/ATTACH]</p><p>These were subject to overheating and were discontinued by Smatree. There were some reports of heat-related failures...as in plastic melting, smoke, etc.</p><p></p><p>[URL unfurl="true"]https://www.amazon.com/gp/customer-reviews/R253BO13OZK40B/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B075K7V42Z[/URL]</p><p></p><p>The SP90 was updated internally (v2) and now has a coaxial charging port and power supply ‘brick’ that runs off AC power and charges the internal battery pack much quicker than the old version.</p><p>[ATTACH=full]12057[/ATTACH] </p><p></p><p>Some dealers still had the old v1 units NIB and were dumping them on eBay for as little as $25.</p><p></p><p>I bought one of these v1 units last year off eBay and bench tested it with an IR gun...it ran significantly hotter than the newer version.</p><p></p><p>I contacted Smatree , had a discussion with their engineering/support folks and they said ‘Do not use it, we’ll send you the updated model...properly dispose of the old unit’. They did not want it back even though I offered to return it.</p><p></p><p>I like the current version and have used it quite a bit with no problems.</p><p></p><p>If you bought the v1 unit please be careful. Always exercise proper caution when dealing with any battery charger or batteries.</p></blockquote><p></p>
[QUOTE="rangemaster728, post: 106613, member: 4458"] There are two versions of the Smatree SP90. Early version (v1)is charged by a micro-USB port: [ATTACH=full]12056[/ATTACH] These were subject to overheating and were discontinued by Smatree. There were some reports of heat-related failures...as in plastic melting, smoke, etc. [URL unfurl="true"]https://www.amazon.com/gp/customer-reviews/R253BO13OZK40B/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B075K7V42Z[/URL] The SP90 was updated internally (v2) and now has a coaxial charging port and power supply ‘brick’ that runs off AC power and charges the internal battery pack much quicker than the old version. [ATTACH=full]12057[/ATTACH] Some dealers still had the old v1 units NIB and were dumping them on eBay for as little as $25. I bought one of these v1 units last year off eBay and bench tested it with an IR gun...it ran significantly hotter than the newer version. I contacted Smatree , had a discussion with their engineering/support folks and they said ‘Do not use it, we’ll send you the updated model...properly dispose of the old unit’. They did not want it back even though I offered to return it. I like the current version and have used it quite a bit with no problems. If you bought the v1 unit please be careful. Always exercise proper caution when dealing with any battery charger or batteries. [/QUOTE]
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Almost tripled my flight time