Optimate 7 Select Tm-271 Charger

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Part# 07-18077
MFR Model# TM-271


OptiMATE Lithium 4s 9.5A / 5s 7.5A TM-271, 10-step 12.8/16V 9.5A Battery saving charger-tester-maintainer (BC - California & Oregon approved)

The ultimate professional battery charger for 12.8V/16V Lithium batteries
OptiMate Lithium LFP Select is perfect for high performance 12.8V (4s) and 16V (5s) LiFePO4 / LFP batteries that demand fully automatic, fast and accurate temperature controlled charging. Perfect for 12.8V / 16V LiFePO4 / LFP batteries sized from 2.5 to 200 Ah. Power saving stand-by mode. Full electronic protection against errors.

Battery SAVE mode with BMS reset:starts from 0.5V with continuous monitoring / testing of charge acceptance or bad / shorted cell condition. Unnecessary (and unsafe) charging of a bad battery is prevented. •safeTº: Automatic charge rate adjustment to ambient temperature sensed at the charger. Reduced charging below freezing, no charging if temperature is below -20ºC/-4ºF (can damage lithium batteries).

Ampmatic:Microprocessor adjusts current to ideal LiFePO4 charge curve to match battery size / condition, for fastest and most complete charge.

Protection against incorrect voltage selection:With 16V selected and a 12.8V (4s) battery is connected OptiMate 7 LFP Select will immediately warn that a low voltage is sensed and then not proceed to charging. USER must confirm the nominal voltage of the connected battery is 16V (5s) before SAVE mode activates. During SAVE mode the charge curve is tracked, if the battery appears to be less than a 5-series 16V battery, it will stop charging.


  • Charging Amps: 9.5A @ 12.8V / 7.5A @ 16V (AmpMatic)
  • Indoor / Outdoor (lowest temperature: -4°F / -20°C)
  • Save: Low Volt Start of 0.5V + 3-step low volt Save and Test
  • Ideal For: LiFePO4 (LFP) 4s / 5s batteries from 2.5 – 200Ah
  • Input: Global (100-240V 50-60Hz), high efficiency (CEC listed), fully sealed
  • Style: Weatherproof case with wall mounts, with 6ft / 180cm AC supply lead and 6ft / 180cm charge lead ending in SAE connector. Weatherproof battery lead, standard battery clip set & fused battery clip set included
  • Safe:No risk of overcharging. Totally safe for vehicle electronics. Sparks suppressed. Safe for long-term battery maintenance. Automatic shut-down if short-circuited or battery disconnected. 3-year limited replacement warranty.
Program Steps
  • Step 1: Low Volt Start (0.5V)
  • Step 2: Test before charge
  • Step 3: Test before charge
  • Step 4: Ultra Low Volt Save
  • Step 5: Low Volt Save / cell montioring
  • Step 6: Test - cell damage
  • Step 7: Cell-balancing Charge
  • Step 8: OptiMate maintenance.
  • Step 9: Test after charge
  • Step 10: OptiMate maintenance


  • LPF / LiFeP04

In The Box

  • Battery Clips (O-04)
  • Automotive Weatherproof Battery Lead (O-11)
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Outstanding timely, quality product order service! as always at the ACS 5-star level!

Mark Y Verified Purchase


June 9, 2021


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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