TDB#223 Battery Maintenance for 3M™ Versaflo™ PAPRs
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TR-341 - Single station, TR-344 - 4-station
TR-640 cradle
TR-641 - Single station, TR-644 - 4-station
Operational Recommendations
3M™ Versaflo™ lithium-ion (Li-ion) battery packs offer quick charging (100% typically in less than 3.5
hours), light weight and compact size. In addition to the general recommendations above, the following
operational recommendations should be followed:
Charging
Initial Use:
The 3M™ Versaflo™ battery packs do not require a learn cycle to calibrate or re-calibrate the
battery pack charge indicator. However, it may take up to three complete charge/discharge cycles for the battery
to reach its maximum capacity and claimed run times. Typically, the difference between the capacity of a new
battery as received and the maximum capacity is only a few percent, and will likely be unnoticeable to the user.
Other than charging the battery upon receipt, no special conditioning is required or recommended prior to initial
use.
Operational Use
TR-300 battery packs have an operating temperature of 23° F (-5° C) to 129° F (54° C).
TR-600 battery packs have an operating temperature of 14° F (-10° C) to 129° F (54° C).
Operating temperature:
Do not expose battery pack to temperatures above 129º F (54º C). Run time will be reduced when used at
temperature extremes. The 3M™ Versaflo™ PAPR battery alarm will activate if battery pack temperature
reaches 130º F (55º C) while the motor blower is in use. If this happens immediately leave the contaminated
area. The motor blower will immediately shut down when the internal battery temperature reaches 140º F (60º
C).
Charging temperature:
The internal battery pack temperature must be between 32º F (0º C) to 104º F (40º C)
when charging – do not charge outside of this range. Optimal internal battery charging temperature is 68º F to
77º F (20º C to 25º C). Outside of the overall temperature range, the charger will indicate a temperature fault
(slow flash amber LED error) and will not charge. Charging will start when battery pack temperature is within
range. Repeated charging outside the optimal temperature range will reduce battery pack run time and cycle
life. If a battery feels hot, let it cool for 1/2 hour before charging. If the charger senses the battery is too hot it
will go into a standby mode until the battery has cooled.
Not intrinsically safe
: The TR-300 and TR-600 PAPR respirator systems and battery pack chargers are not
rated for intrinsic safety/hazardous location use. Use the PAPR system and charge battery packs only in non-
hazardous locations.
Run time:
The run times for each 3M™ Versaflo™ PAPR system will vary for each configuration and is
dependent on headgear, filter/cartridge, selected airflow, filter loading, battery selected, battery condition, and
environmental conditions. For TR-600, refer to the TR-600 System Run Times Guide for additional
information. For TR-300, refer to the TR-300 PAPR User Instructions.
Service life: 3M™ Versaflo™ battery packs provide approximately 250 full capacity charge/discharge cycles
while maintaining 80% of the original charge capacity over the course of the first year of service when used
under recommended conditions. See Figure 1. If the battery is used infrequently over an extended period of
time, the approximate 250 full cycle equivalents may not be reached due to natural degradation of the battery’s
chemistry. Normal use of the battery and natural aging of battery cells will gradually decrease the battery’s
available capacity, which results in decrease in run time. Batteries may continue to be used as they age, as long