Frequently Asked Questions

Frequently Asked Questions


User need answers to many of their doubts and queries related to battery. You may find answers as below with respect to:

  • Compatibility
  • Terminology
  • Warranty
  • Safety
  • Unboxing
  • Handling
  • Storage
  • Maintenance
  • Charging
  • Trouble Shooting
  • Transportation
  • Regulatory Information
  • Disposal and Recycling



SES® has been supplying medical batteries and medical battery packs for over 27 years. As a leader in our field, we have an excellent reputation within the medical sector for our product quality and customer service. We are the largest manufacturer of compatible medical batteries in India.

We work with world leading healthcare organisations including B Braun, Mindray, Schiller etc. to supply a comprehensive range for different batteries. This includes batteries for defibrillator, monitor, syringe pump, ventilator and many more devices. We confirm to all the directives and legislation with regards their supply.


What is SES® compatible battery?

  • Compatible means battery is not been sourced from OEM.
  • SES® Compatible Batteries are identical in its specifications and fit-n-foam factor to original.
  • Identical components are used to make SES® compatible batteries, ensuring the same level of reliability and functionality.
  • SES Compatible Batteries are CE marked as required by the Medical Devices Directive.
  • They are fully compliant with Medical Devices Directive 93/42/EEC, Battery Directive 2013/56/EU
  • Manufactured under quality procedure of ISO 9001: 2015 & ISO 13485




Capacity: Capacity is the measure of the energy stored in a battery. Expressed in Ah (Ampere hour) or mAh (milli-Ampere hour), capacity defines the ability of a battery to perform under specified discharge criteria over a set period of time. A battery rated as High Capacity or Extended Capacity exceed OEM specifications and will provide longer run time than the original battery.

Self-Discharge: Self-discharge is the loss of useful capacity within a battery due to internal chemical reactions. Self- discharge will occur within all battery chemistries and will be influenced by temperature. Self-discharge will occur regardless of whether the battery is connected to a device or not.

Cycle Life: One cycle of a battery is a discharge from full charge to full discharge and a return to full charge again. The total number of cycles a battery can perform before failure is called its Cycle Life. Most battery manufacturers will not discuss the Cycle Life of their product. Many advertised Deep Cycle batteries have not been tested, or, which is the case with cranking batteries, were never designed for long Cycle Life.

Shelf-life: The amount of time a battery will retain an operable percentage of its stated capacity (calculated under ambient temperature storage conditions).

Temperature: Temperature variances can have a dramatic impact upon the performance and life of a battery. High temperatures intensify the chemical reactions inside a battery and may cause permanent damage to the battery. Lower temperatures can slow chemical processes to the point where the battery performance may not meet the requirements of the device. Batteries are best stored, charged, and operated at room temperature, generally rated at 25°C.

Primary batteries: Primary batteries are “one time use” batteries. Once the chemical reaction between the cell’s electrode materials has ended, the cell loses its ability to produce energy. It must be removed and replaced with a fresh cell/ battery.

Secondary batteries: Secondary batteries are “rechargeable batteries”. The chemical reaction that takes place within the cell is reversible and repeatable for hundreds or thousands of cycles, depending on the chemistry.

Drain rate of a battery: The term “drain rate” refers to how rapidly energy is released from a battery. The drain rate is the speed at which its electrical charges is depleted. Different chemistries and cell types provide different drain rates than others.

Discharge modes: A battery may be discharged under different modes, depending on the equipment load. The discharge mode selected will have a significant impact on the service life of a battery in a specified application. The three typical modes under which a battery may be discharged are:

  • Constant Resistance ("R"): In this mode, the resistance of the equipment load remains constant throughout the discharge
  • Constant Current ("C"): In this mode, the current drawn by the device remains constant during the discharge
  • Constant Power ("P"): In this mode, the current during the discharge increases as the battery voltage decreases, thus discharging the battery at a constant power level (power = current × voltage).

Overcharge: Charging the batteries for more than its rated capacity is over charging. 10% overcharging is relatively safe and do not impose serious threat like fire, burnt, swelling. Always check charger voltage w.r.t battery pack declared voltage.

Deep-Discharge: Batteries are supposed to be used in equipment’s in such a manner that it shouldn’t be discharged more than 60% of its rated capacity. Because of continuous demand on equipment to be used unplugged batteries are often subjected to more than 80% depth of discharge. This a deep discharge situation and limits battery cycle life.

Cell-Imbalance: No two cells are identical. There is always a slight difference in the voltage and state-of charge (SOC), self-discharge rate, capacity, impedance, and temperature characteristics, even for cells that are of the same model, from the same manufacturer and even from the same batch of production.




Please refer to warranty page of this Site or download our Limited Warranty Policy for specific details. Contact customer support at +91-9992113215 or e-mail us at for more information and support.




Safety related information please refer to Safety Data Sheets page of this Site and download chemistry specific Material Safety Datasheet (MSDS) from there.  MSDS are prepared based on guidelines draft by Occupational Health and Safety Management Systems.




SES® Batteries are securely packed in insulation materials like cardboard, plastic or laminates. Bulk packing is further packed in wooden crates or pallets. After purchasing the SES® Battery you must be careful in handling it. First unbox it from the packaging, to do so please follow these steps:

Wooden Box:

  • Keep the wooden crate in upright position as marked.
  • Do not use any sharp heavy tools for unpacking battery packs from the wooden crates.
  • Use nail pullers to remove top lid of crate after removing metal or nylon straps.
  • There are no preservatives in wooden crate or in the battery box.

Cardboard Box:

  • Remove all the packaging materials.
  • Use a knife, blade or scissors to cut the box in top and open it.
  • Pull the Battery pack out from the box carefully and place it on the table.
  • Remove all the foams and tapes covering the battery.
  • Peel off the plastic sheet wrappers from the battery.
  • Carefully unpack the contents, check that the battery is free from damage.
  • Make sure your battery is in good condition if not return it and claim for a new battery.


  • Dump the plastic sheet wraps or laminates in recycle bin.
  • Maintain the outer cardboard box and foam for few days, if need for repack and return.




PRECAUTIONS:  Refer to safety data sheet for safe operating instructions:

  • Handle batteries and or battery-powered devices cautiously to not damage the battery casing or connections.
  • Keep batteries from contacting conductive materials, water, seawater, strong oxidizers and strong acids.
  • Do not place batteries in direct sunlight, on hot surfaces or in hot locations.
  • Inspect batteries for signs of damage before use.
  • Never use and promptly dispose of damaged or puffy batteries.
  • Keep all flammable materials away from operating area.
  • Allow time for cooling before charging a battery that is still warm from usage.
  • Allow to cool before using a battery that is still warm from charging.
  • Accidental short circuit will bring high temperature elevation to the battery as well as shorten the battery life.
  • Be sure to avoid prolonged short circuit since the heat can burn attendant skin & even rupture of the battery cell case.
  • Metal covered tables or belts used for assembly of batteries into devices can be the source of short circuits; apply insulating material to assembly work surface.




  • Avoid shorting the battery. 
  • Do not immerse in water. 
  • Do not disassemble or deform the battery. 
  • Do not expose to or dispose of the battery in fire. 
  • Avoid excessive physical shock or vibration. 
  • Keep out of the reach of children. 
  • Battery must be charged in an approved charger. 
  • Never use a modified or damaged charger.
  • Use for specified product applications only.
  • Store in a cool, dry and well-ventilated area.
  • Never use a battery that has suffered abuse.




Over-charging: Overcharging is the most destructive element in battery service. Never reverse charge or overcharge batteries with high currents (i.e. higher than rated). Doing so causes rapid gas generation and increased gas pressure, thus causing batteries to swell or rupture. Do not leave the battery in a charger once it is fully charged. If overcharging is suspected, correct immediately.


Over-discharging: Over discharging is a problem which originates from insufficient battery capacity causing the batteries to be overworked. Discharges deeper than 50% of the rated capacity significantly shorten the Cycle Life of a battery. Infrequent or inadequate complete recharging can also cause over discharging symptoms called ACTIVE MATERIAL HARDING. Despite that charging equipment is regulating back properly, over discharging symptoms are displayed as loss of battery capacity and lower than normal specific gravity. Batteries should be cycled properly until the capacity returns to the battery. Gel, Polymer and Li-Ion batteries may not recover. In most cases, the battery may be returned to complete its service life.


Over-Temperature: Keep vigilance on battery temperature. Its important. Battery charge and discharge reactions are exothermic in nature and product heat while charging and high current use. Monitor that battery temperature should rise above 55OC under normal ambient temperature of 25OC.


Short-circuit: Utmost precaution is required with battery working, especially plug-in and out the battery pack to an equipment. Always ensure your device is switch-off in both the process. Never test the battery charge potential with shorting the battery terminals. SES® batteries have non-resettable fuse and chem fuse, which often blow during such test. Short circuit to its maximum should be avoided.




Charging from OEM charger: Make sure you are getting full charge indication from host equipment. Also, must ensure that charging voltage is higher than battery on full load. Consult nearby engineer or SES technical expert for help if your OEM charger is not charging the batteries. Sometimes OEM charger’s power supply or charge controller circuit is faulty

Charging from generic chargers: Alternators and float battery chargers including regulated photo voltaic chargers have automatic controls which taper the charge rate as the batteries come up in charge. It should be noted that a decrease to a few amperes while charging does not mean that the batteries have been fully charged.

Can I use any charger to charge a rechargeable lithium battery?

Not all batteries are the same! Never use a charger that was not designed for the battery in question. Every charger is specially tailored for use with a specific type of battery chemistry, voltage and rating.

What is most important to check in a charger?

In a charger the output Line and load regulation should be less than ±1% of the correct temperature compensated value. Second most important is the Output filtering must be less than 3 mV filter (on battery) in 12 VDC unit. In the absence of line regulation and output filtering charger itself kill the battery early.

Do I Need a Power Supply or a Battery Charger?

The terms “Power Supply” and “Battery Charger” are often used interchangeably, but they perform distinct functions. A power supply is designed to supply a constant voltage to a load. As the load requirements change, it continues to supply a fixed DC level. A true battery charger generally supplies a regulated current, first to charge the battery, and then switches to a regulated voltage mode. This is specifically required for Li-Ion chemistry where overcharging is not only damaging to the battery cells, but can also pose a possible fire hazard. A smart battery charger will not only never overcharge cells, but can also monitor battery temperature, switching off a fast charge when certain parameters are exceeded.

A power supply used as a charger cannot do this, and will continue to pump energy into a battery regardless of its condition; fully charged, battery fault, or shorted cells. In order to achieve maximum battery service life, a properly designed charger should always be used to charge cells.




SES® batteries will be shipped in accordance with the latest transport shipping regulations. If your country of origin is not listed at the checkout this may be because we are unable to ship our SES® Batteries to certain countries, however we may still be able to ship accessories, chargers etc., or, alternatively you may order products ex-works and arrange collection by your own means of transportation.

Please refer to the MSDS sheet for the transportation information on different type of batteries.




These is no regulation on primary batteries. However, India is having regulation on all types of secondary batteries for use in portable applications.

In 2012 India-CRS Compulsory Registration Scheme (CRS) was introduced by Department of Electronics and Information Technology (DeitY) now called Ministry of Electronics and Information Technology (MeitY) notified as "Electronics and Information Technology Goods (Requirement for Compulsory Registration) Order, 2012" on 3 Oct 2012 along with Bureau of Indian Standards (BIS) as per the provision of Chapter IVA of The Bureau of Indian Standards Rules, 1987. It is mandatory for manufacturers to get their products registered before launching them in market. The products are tested for safety as per the applicable IS standard. Overseas Manufacturers are required to have a local representative in India who will represent the manufacturer locally and will be responsible for placing the product in the market. To make this program robust, Market Surveillance has been designed to ensure compliance.

Item                                                                                    Regulation                                Effect from

Storage Batteries, MF/ SMF/ VRLA/ GEL Lead-Acid         IS 16270: 2014                           Jan 01, 2019

Nickel Cadmium Batteries/ Battery packs/ Cells                IS 16046: 2015                           June 1, 2016

Nickel Metal Hydride Batteries/ Battery packs/ Cells         IS 16046: 2015                           June 1, 2016

Li-Ion/ Li-polymer/ LiFePO4/ LTO Batteries/ Cells             IS 16046: 2015                           June 1, 2016

Power banks for use in portable applications                    IS 13252(Part 1):2010                 May13, 2015




Spent batteries are not considered to be a hazardous waste.  Different types of used batteries are disposed of in a different manner. This can be treated through different methods. For further details, please refer Safety Data Sheets of battery type.