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FREQUENTLY ASKED QUESTIONS

  • What are the recommended float and equalize voltage ranges for the different cell types? How should they be adjusted for temperature?
    • FLOAT:
      • Absolyte IIP:
        2.23 - 2.27 volts per cell at 25 �C
        Vcorrected = V25 C - [0.0055 V/ �C x (Tactual - 25 �C)]
        Do not adjust below 2.20 volts per cell or above 2.35 volts per cell.
      • Absolyte XL:
        2.23 - 2.25 volts per cell at 25 �C
        Use same formula as above for temperature correction
        Do not adjust below 2.20 volts per cell or above 2.35 volts per cell.
      • Lead calcium:
        2.17 - 2.25 volts per cell (1.215 specific gravity)
        2.23 - 2.33 volts per cell (1.250 specific gravity)
      • Lead antimony:
        2.15 -- 2.17 volts per cell (1.215 specific gravity)
        2.19 - 2.23 volts per cell (1.250 specific gravity)
      • Marathon/Sprinter:
        2.25 - 2.30 volts per cell
        Use same formula as above for temperature correction.
    • EQUALIZE: (times listed below are for after charging current has tapered and stabilized)
      • Absolyte IIP:
        2.30 volts per cell (at 25 �C) for 24 hours
        2.35 volts per cell (at 25 �C ) for 12 hours
        Use same formula as above for temperature correction.
        Do not adjust below 2.20 volts per cell or above 2.35 volts per cell.
      • Absolyte XL:
        Same as Absolyte IIP
      • Lead calcium:
        Cell Volts Time (hr)
        for 1.215 SG*
        Time (hrs)
        for 1.250 SG*
        2.24 222 ----
        2.27 166 ----
        2.30 105 ----
        2.33 74 166
        2.36 50 118
        2.39 34 80
        2.42 ---- 54
        2.45 ---- 36
      • Lead Antimony:
        Cell Volts Time (hrs)
        for 1.215 SG*
        Time (hrs)
        for 1.250 SG*
        2.24 80 ----
        2.27 60 ----
        2.30 48 ----
        2.33 36 58
        2.36 30 51
        2.39 24 39
        2.42 ---- 29
        2.45 ---- 26
        2.48 ---- 24

        * Periods listed are for cell temperatures of 21 �C to 32 �C; for temperatures 13 �C to 20.5 �C double the number of hours. For temperatures 4�C to 12 �C, quadruple the number of hours.

      • Marathon/Sprinter:
        2.35 volts per cell (at 25 �C) for 24 hours
        2.40 volts per cell (at 25 �C) for 12 hours
        Use same temperature as above for temperature correction.
        Do not adjust below 2.21 volts per cell or above 2.40 volts per cell.


  • Given a required constant current/power discharge, end voltage, and duration, what cell type is necessary? Given a certain cell type, constant power/current discharge, and end voltage, what is the back-up time?

    Locate the correct amp/watt data table for the end voltage you are using. Locate the appropriate column for the required back-up time. Read down until you find the current/power you are looking for then read straight across to the left for the cell type.

    For batteries with complex load profiles, sizing should be done per IEEE-485. Please consult Support Power, Inc., we will calculate the appropriate GNB cell size per IEEE-485 and provide you with a copy of the cell sizing worksheet.

    To determine back-up time locate the correct amp/watt data table for the end voltage you are using. Next, locate the cell type you have and read straight across to the required amp/watt value then straight up for the back-up time.



  • Questions about acid/electrolyte quantities for reporting purposes.

    These types of questions should be forwarded to Support Power at 631-218-0876.



  • What is the torque setting for terminals and intercell connectors? For Absolyte tray hardware?
    • Absolyte IIP and XL
      Torque all terminal and intercell connections to 100 in�lb at least once per year. Tray hardware should be torqued to 35 ft�lb


    • Flooded cells
      M & N line cells with 1/8" connectors - 100 in�lb at least once per year
      M & N line cells with two "sandwiched" 1/8" connectors or a �" connector - 150 in�lb at least once per year.
      PDQ & N & H line cells with �" connectors - 150 in�lb at least once per year.


    • Marathon/Sprinter
      Torque all connections to 100 in�lb at least once per year.


  • What are the short circuit current and internal resistance values for a particular cell type?
    • Marathon/Sprinter
      Model SC current (amps)
      M12V30 120
      M12V40 1500
      M12V70 1700
      M12V90 2000
      M6V180 2000
      S12V120 1500
      S12V170 1500
      S12V300 2000
      S12V370 2000
      S6V740 2000
    • Absolyte XL
      Model SC current (amps)
      XL 2000 14600
      XL 3000 21900
      XL 4000 29200
      XL 5000 36500
      XL 6000 43800
    • Absolyte IIP
      Cell Type Short Circuit
      Current(amps)
      50A05 1024.71
      50A07 1537.07
      50A09 2049.43
      50A11 2561.78
      50A13 3074.14
      50A15 3586.50
      50A17 4098.86
      50A19 4611.21
      50A21 5123.57
      50A23 5635.93
      50A25 6148.28
      50A27 6660.64
      90A05 1296.84
      90A07 1945.26
      90A09 2593.67
      90A11 3242.09
      90A13 3890.51
      90A15 4538.93
      90A17 5187.35
      90A19 5835.77
      90A21 6484.18
      90A23 7132.6
      90A25 7781.02
      90A27 8429.44
      90A29 9077.86
      90A31 9726.28
      90A33 10374.69
      100A09 2911.32
      100A11 3639.15
      100A13 4366.98
      100A15 5094.81
      100A17 5822.64
      100A19 6550.47
      100A21 7278.30
      100A23 8006.13
      100A25 8733.96
      100A27 9461.79
      100A29 10189.62
      100A31 10917.45
      100A33 11645.28
      100A39 13100.94
      100A45 15284.43
      100A51 17467.92
      100A57 19651.41
      100A63 21834.9
      100A69 24018.39
      100A75 26201.88
      100A81 28385.37
      100A87 30568.86
      100A93 32752.35
      100A99 34935.84
    • Flooded
      Cell Type Short Circuit
      Current(amps)
      M*T-05 1886
      M*T-07 2696
      M*T-09 3364
      M*T-11 4049
      N*T-07 3687
      N*T-09 4865
      N*T-11 6043
      N*T-13 7206
      N*T-15 8347
      N*T-17 9486
      N*T-19 10595
      N*T-21 11704
      N*T-23 12706
      N*T-25 13678
      N*T-27 14718
      N*T-29 17136
      N*T-31 18360
      N*T-33 19584
      N*T-35 20808
      H*T-21 20756
      H*T-23 21846
      H*T-25 22772
      H*T-27 23754
      H*T-29 24104
      H*T-31 24497
      H*T-33 25288
      H*T-35 25798
      H*T-37 26809
      M*X-05 2082
      M*X-07 3017
      M*X-09 3987
      M*X-11 4895
      M*X-13 5820
      M*X-15 6728
      N*X-07 4160
      N*X-09 5446
      N*X-11 6732
      N*X-13 7986
      N*X-15 9210
      N*X-17 10404
      N*X-19 11429
      N*X-21 12393
      N*X-23 13632
      N*X-25 14779
      N*X-27 15912
      N*X-29 17136
      N*X-31 18360
      N*X-33 19584
      N*X-35 20808
      P*Q-11 12474
      P*Q-13 14313
      P*Q-15 16153
      P*Q-17 17993
      P*Q-19 18881
      P*Q-21 20426
      P*Q-23 21970
      P*Q-25 23515
      P*Q-27 25059
  • What are the recommended spare parts for a battery system?
    • Absolyte IIP:
      • 10% connector hardware (W02-062501 and W03-0601)
      • Cover leg Kit (K17-COVLEG)
      • Intermodule Hardware Kit (K17-417000)
      • Absolyte IIP Accessory Kit (K17-400403)
      • Connectors (contact Support Power, Inc.)
    • Absolyte XL:
      • 10% connector hardware (W02-062501 and W03-0601)
      • Intermodule Hardware Kit (K17-417000)
      • Absolyte XL Accessory Kit (K17-418404)
      • Connectors (contact Support Power at (631) 218-0876 for P/N)
    • Flooded:
      • 10% connector hardware (contact sales representative for P/N)
      • Flash Arrestor Assembly (N03104870 for large; N03104881 for small)
      • Electrolyte sampling tube cover (N05103518002)
      • Hydrometer (Z02107801250 for 1.215 SG; Z02107801280 for 1.250 SG)
      • Thermometer (Z03043529002 for 216mm; Z03043529003 for 244mm)
      • Seal Nuts (F04-401132-001 for 1.5" square posts; F04-401131-001 for 1.0" square posts) Part number is for cells manufactured after August 1995
      • Connector (contact sales representative for P/N)
  • What is GNB's equivalent to a competitor's battery? What is GNB's current equivalent to an old GNB cell?

    Oftentimes, it is possible to determine equivalents by comparing the product literature (cell size, amp-hour rating, discharge characteristics). If this is not possible, please contact Support Power, Inc. at (631) 218-0876.



  • What is the list price for a particular part?

    Please contact Support Power at (631) 218-0876.



  • How can I obtain a brochure or Installation & Operating Manual for a particular cell?

    Please contact Support Power at (631) 218-0876.

  • What are the space considerations for Absolyte IIP?

    There should be a minimum of 4.5" between the stack and the wall and between back-to-back stacks. A minimum of 36" aisle space should be available adjacent to the battery system.

    Also note, allow at least six inches past total system length wherever a terminal plate assembly is to be located.



  • How does temperature affect batteries?

    As a rule of thumb, for each 10 �C above 25 �C, the battery life is halved. At temperatures below 25 �C, the capacity is reduced according to the following table:

    Temperature Percent capacity
    25 �C 100%
    20 �C 95%
    15 �C 90%
    10 �C 84%
    5 �C 76%
    0 �C 71%


  • What is end voltage? What is the difference between a high and low end voltage?

    End voltage is the voltage of the cell (or battery) at the end of the duty cycle. End voltage is usually selected based on the duration of the discharge and the minimum system voltage the equipment can tolerate. For long duration discharges (12+ hours), it is recommended that a high end voltage be used (1.90+ volts per cell). For short duration discharges (< 90 min.) such as UPS systems, a low end voltage is used (e.g. 1.67 volts per cell). For normal duration discharges (90 min to 12 hr), an average end voltage (e.g. 1.75 volts per cell) should be used.



  • Who should I call for GNB battery recycling information?

    For more information on GNB's lead-acid battery recycling program please call:

    • 631-277-1034
  • What is the difference between the Absolyte's AGM technology and gel cells?

    To immobilize the electrolyte in a gel cell, the electrolyte is mixed with fumed silica then the cell is filled while the mixture is still liquid. In time, the mixture gels similar to what one observes with "Jello".

    In GNB's Absolyte cells, the electrolyte is absorbed in the glass separators (similar to a sponge).



  • Questions on weights, dimensions, general design features for a particular cell?

    See the on-line product literature or call Support Power at 631-218-0876



    1. To Contact Us


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      Telephone 631-218-0876
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      Telephone 914-386-2311
      Fax 914-386-2312
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