Sofirn SC21 Pro - Troubleshooting and Maintenance


Pay close attention to the proper installation of the battery. Always check that the positive end of the
battery is visible when you unscrew the head from the tube before screwing the tube back on.

Please unscrew the head half a turn to avoid unwanted activation during transport. It also prevents
the battery from draining while the flashlight is in standby.
 Avoid hitting or dropping the flashlight.
Troubleshooting and Maintenance

Disassembling the sealed head can damage the flashlight and voids the warranty.

Sofirn, Ltd. recommends using high-quality brand batteries. Damage by battery leakage voids the
warranty.

Remove the battery if the flashlight will not be used for an extended period of time.

To prevent self-discharge or accidental activation during storage or transportation, unscrew the
head from the tube by half a turn or remove the battery.
 Every 6 months threads should be wiped with a clean cloth followed by a thin layer of silicone
grease.
 To maintain a proper level of waterproofness, replace worn-out o-rings with an approved spare.
 Troubleshooting: Clean battery contacts regularly as dirty contacts may impair the performance of
the flashlight. If you experience problems (flicker, shine intermittently or failure turn on) the
following root causes and solutions should be tried:
Reason A: The battery needs a replacement (battery voltage is below 2.7V).
Solution: Replace the battery with an approved type of a fully charged battery.
Reason B: Threads, PCB board contact or other contacts are dirty.
Solutions: Please clean the contact points with a cotton swab soaked in rubbing alcohol.
Reason C: The flashlight will not turn on upon first use.
Solution: Please do not forget to remove the insulation sticker from the battery on first use.
If the above methods do not work please refer to the warranty policy before contacting your authorized
distributor.
Sofirn Limited:
Tel: +86-755-23440047 Fax: +86-755-23440141
Web: www.sofirnlight.com
E-mail: us@sofirnlight.com eu@sofirnlight.com
Please contact us if you have any questions.
If your product is defective please contact us for replacement within warranty period.
Manufacturer: Shenzhenshi Jinba Technology Co.,Ltd
Address: 1/F to 9/F, 1st Building, NO.110 Tenglong Industrial Center, Guanlan Street, Longhua New
District, Shenzhen 518000, China