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Home » Custom Batteries » Custom Lithium Ion / Polymer

Custom Lithium Ion / Polymer

House of Batteries manufactures high quality, high performance custom lithium ion (Li-ion) and lithium polymer battery packs and assemblies. Using advanced mechanical and electronic design tools, our expert battery design team will optimize the manufacturability, safety, and reliability of your custom battery packs, giving you the most dependable and cost effective lithium ion or lithium polymer battery pack solution for your needs.

View individual product specifications for custom lithium ion and lithium polymer batteries.

Custom Lithium Ion Battery Packs (Li-Ion Batteries)

Lithium ion (Li-ion) battery packs are an advanced chemistry that provides increased performance over nickel or lead based chemistries at a price premium. Li-ion and lithium polymer batteries can have as much as twice the energy density of NiCd (nickel cadmium), have relatively low self-discharge rates, and are capable of high discharge currents.

The lithium ion chemistry is available in several variations. Lithium cobalt oxide provides the greatest energy density; lithium manganese offers greater safety with lower energy density than lithium cobalt oxide; lithium iron phosphate provides high discharge rate capabilities, as well as long cycle and calendar life. Mixed cathodes can be used to optimize lithium rechargeable cells’ specific performance characteristics.

  • Cell voltage: 3.2 – 3.7V (nominal)
  • Capacity: 500mAh to 5000mAh
  • Energy by volume: 270 Wh/L to 324 Wh/L
  • Energy by weight: 105 Wh/kg to 130 Wh/kg
  • Cycle life: 300 – 1000 cycles
  • Self discharge rate: approx. 10% per month
  • Operating temperature range: -20°C to 60°C
  • Preferred charge method: constant voltage/constant current
  • Size: variable
  • Applications: military, industrial, medical, consumer electronics

Because of lithium’s inherent volatility and lithium ion’s high energy density, every lithium ion battery pack and cell requires a special control circuit to manage its upper and lower voltage thresholds and to regulate its operating current and temperature during charge and discharge.

Lithium ion battery technology is always evolving. Better manufacturing techniques continue to bring the cost of lithium ion cells down, and new electrode materials provide improved capacities.

In general, lithium ion charge circuits are of two-stage constant current/constant voltage design. Fully discharged cells take constant current charges at a rate of 1C (1x the rated capacity), until reaching their set voltage of between 3.6 and 4.2 volts (depending on specific chemistry), a process which takes approximately one hour. The batteries’ chargers will then switch to constant voltage, with the current tapering off until the batteries are fully charged—approximately another two hours. The entire charging process is a fairly fast one, at about three hours. Lithium ion batteries may be removed from charge before they’re fully charged, with no side effects. Li-ion batteries cannot be trickle charged, as they do not tolerate overcharge conditions.

Typical lithium ion cell characteristics
Discharge Characteristics for a Typical Li-ion 18650 Cell
Typical lithium ion cell characteristics
Discharge Vs. Temperature Characteristics for a Typical Li-ion 18650 Cell
Typical lithium ion cell characteristics
High Rate Discharge Characteristics for a Typical Li-ion 18650 Cell
Typical lithium ion cell characteristics
Voltage Vs. Current Discharge Characteristics for a Typical Li-ion 18650 Cell

Custom Lithium Polymer Battery Packs

Lithium-ion-polymer batteries differ from lithium-ion batteries only in construction—it is not a unique and different chemistry. Li-polymer can be created in an array of chemistries, the most widely used of which is Li-cobalt. The difference in construction over conventional li-ion cells allows for lower cost, safer operation, and flexible packaging options; cells as thin as a credit card are possible. The combination of these factors makes custom lithium polymer battery packs and battery assemblies an increasingly popular choice for a wide range of applications.

  • Cell voltage: 3.2 – 3.7V (nominal)
  • Capacity: 500mAh to 3000mAh
  • Energy by volume: 250 Wh/L
  • Energy by weight: 120 Wh/kg
  • Cycle life: 500+ cycles
  • Self discharge rate: approx. N/A
  • Operating temperature range: -20°C to 60°C
  • Preferred charge method: constant voltage/constant current
  • Applications: audio-visual equipment, cellular phones, office automation, notebook PCs, PDAs, handheld devices
Show: 
Product Name  Model  Manufacturer  Chemistry  Voltage  Capacity  PDF   
Lithium Ion -​ 383040

383040
Saehan Batteries
Lithium Polymer
3.7
390MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 393450

393450
Saehan Batteries
Lithium Polymer
3.7
630MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 422025

422025
Renata Batteries
Lithium-Ion
3.7
135MAH
  Add to Quote

Lithium Ion -​ 424142

424142
Saehan Batteries
Lithium Polymer
3.7
690MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 426395

426395
Saehan Batteries
Lithium Polymer
3.7
2400MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 451730

451730
Renata Batteries
Lithium-Ion
3.7
170MAH
  Add to Quote

Lithium Ion -​ 451835

451835
Saehan Batteries
Lithium Polymer
3.7
200MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 463048

463048
Saehan Batteries
Lithium Polymer
3.7
700MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 4655060

4655060
Saehan Batteries
Lithium Polymer
3.7
1400MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 473352

473352
Saehan Batteries
Lithium Polymer
3.7
820MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 481140

481140
Renata Batteries
Lithium-Ion
3.7
120MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 484852

484852
Saehan Batteries
Lithium Polymer
3.7
1200MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 496395

496395
Saehan Batteries
Lithium Polymer
3.7
3000MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 501230

501230
Renata Batteries
Lithium-Ion
3.7
120MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 501230(04)

501230(04)
Renata Batteries
Lithium-Ion
3.7
90MAH
  Add to Quote

Lithium Ion -​ 501235

501235
Renata Batteries
Lithium-Ion
3.7
120MAH
Spec Sheet
Add to Quote

Lithium Ion -​ 501235(02)

501235(02)
Renata Batteries
Lithium-Ion
3.7
150MAH
  Add to Quote

Lithium Ion -​ 502030

502030
Renata Batteries
Lithium-Ion
3.7
200MAH
  Add to Quote

Lithium Ion -​ 521622(03)

521622(03)
Renata Batteries
Lithium-Ion
3.7
140MAH
  Add to Quote

Lithium Ion -​ 546395

546395
Saehan Batteries
Lithium Polymer
3.7
3550MAH
Spec Sheet
Add to Quote

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